MESON Chess Problem Database
Problem Display
PID: 171019 (knR2Q2/1p6/2P5/8/8/K7/8/8 w - - 0 1)
Lincoln, Robert A
StrateGems, 2017
#2
4 + 3
| 5454 | Near Snap | 2018 |
SOLUTION
- SOUND
- Tries
- 1.Qe7?
- threat
- 2.Qxb7#
- 1...Ka7
- 2.Qxb7#
- 1...b5
- 2.Qb7#
- 1...b6
- 2.Qb7#
- 1...bxc6!
- threat
- 1.Qg7?
- threat
- 2.Qxb7#
- 1...Ka7
- 2.Qxb7#
- 1...b5
- 2.Qb7#
- 1...b6
- 2.Qb7#
- 1...bxc6!
- threat
- 1.Qf4?
- threat
- 2.Qxb8#
- 2.Qa4#
- 1...bxc6
- 2.Qxb8#
- 1...b5
- 2.Qxb8#
- 1...Ka7!
- threat
- 1.Qf7?
- threat
- 2.Qxb7#
- 1...Ka7
- 2.Qxb7#
- 1...b5
- 2.Qb7#
- 1...b6
- 2.Qb7#
- 1...bxc6!
- threat
- 1.Qe7?
- Keys
- 1.Qb4!
- threat
- 2.Qa5#
- 2.Qa4#
- 2.Qxb7#
- 1...Ka7
- 2.Qxb7#
- 1...bxc6
- 2.Qxb8#
- 1...b5
- 2.Qa5#
- 1...b6
- 2.Qa4#
- threat
- 1.Qb4!
Anticipated by 80859(1973)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Tries
- Try
- Q(D);
- Threat
- QAB1(D),XP(a)
- Vars
- K(b);N_SPINS(c),P-FLIGHT,P_SPINP(a)::QAR1(D),XP(a)
- P(a);::QAB1(D)
- Refutation
- P(a);XP(B)
- Try
- Q(D);
- Threat
- QAB1(D),XP(a)
- Vars
- K(b);N_SPINS(c),P-FLIGHT,P_SPINP(a)::QAR1(D),XP(a)
- P(a);::QAB1(D)
- Refutation
- P(a);XP(B)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- P(a);XP(B)::QAR1(D),XS(c)
- P(a);::QAR1(D),XS(c)
- Refutation
- K(b);N_SPINS(c),P-FLIGHT
- Try
- Q(D);
- Threat
- QAB1(D),XP(a)
- Vars
- K(b);N_SPINS(c),P-FLIGHT,P_SPINP(a)::QAR1(D),XP(a)
- P(a);::QAB1(D)
- Refutation
- P(a);XP(B)
- Try
- Actual
- Q(D);
- Threat
- DUALS(3)
- Vars
- K(b);N_SPINS(c),P-FLIGHT::QAR1(D),XP(a)
- P(a);OGATE,XP(B)::QAR1(D),XS(c)
- P(a);::QAR(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).