GNU Go 3.1.18 released December 23, 2001

This version does pretty well on the regressions. The CVS tag
is rel-3-1-18. All or part of the following patches were used. 
The patch inge_1_18.3 is still pending.

gunnar_1_18.11. Mostly tuning. 
trevor_1_18.5. New testsuite. 
gunnar_1_18.10. mkpat checks diagram sizes. 
inge_1_18.4b. adjusted_worm_attack_value adjusted. Bugfix of inge_1_18.4. 
trevor_1_18.2. Indented output of secondary move values.
trevor_1_18.3. Tuning. 
trevor_1_18.4. Regression fixes and addition. 
gunnar_1_18.9. atari_atari improvements. 
gunnar_1_18.8. New gtp commands. 
gunnar_1_18.7. mkpat improvement. 
gunnar_1_18.6. qsort() platform dependency resolved. 
gunnar_1_18.5. linear_eye_space() removed. 
gunnar_1_18.4. Regression revisions. 
arend_1_18.5. Hoshi tuning. 
trevor_1_18.1 . Various changes.
arend_1_18.4. Test updates. 
teun_1_18.2. Array bound violation. 
arend_1_18.3. cvsignore fixes. 
arend_1_18.1. New scheme to filter out redundant move reasons. 
arend_1_18.2. Bugfix in estimate_territorial_value(). 
gunnar_1_18.3. Regression and TODO revisions. 
gunnar_1_18.2. Tuning. 
teun_1_18.1. Array bound violations, one fixed here, one in gunnar_1_18.1. 
gunnar_1_18.1. Bugfix in owl_defendpats.db. 
inge_1_18.1b. Debugboard revisions. Supercedes inge_1_18.1. 

- 1D conversion of incremental.texi
- new function dragon_looks_inessential() in dragon.c
- adjusted_worm_attack_value() revised
- indented debug output of secondary move values
- new local struct aa_move in combinations.c
- new pattern class 'c' for conditional moves in aa_attackspats.db
- atari_atari() tries to attack smallest targets first
- combinations() finds multiple defenses when opponent has a combination attack
- new gtp commands owl_connection_defends and owl_substantial
- mkpat checks that main diagram and constraint diagram have the same size 
- mkpat stricter in parsing of classification field
- new function gg_sort() in gg_utils.c
- all calls to qsort() replaced by calls to gg_sort()
- linear_eye_space() removed
- make RTRACE and VTRACE variatic functions same as macros
- debug output and valuation of attack on defenseless stones corrected
- TODO revised
- fixed value of J patterns no longer scaled with board_size
- bugfix in owl_attackpats.db pattern D1137
- assertion added in owl_escape_value()
- bugfix in moves_to_connect_in_three_moves() in readconnect.c
- support for all tactical worm points in debugboard
- tuning
- owl tuning
- influence tuning
- atari_atari tuning
- test revisions