MESON Chess Problem Database
Problem Display
PID: 90526 (2b5/p1Qpp3/k3q2R/Np6/8/2P5/K2B4/5B2 w - - 0 1)
Ahlheim, Karl-Heinz
Die Schwalbe, 1968
#2
7 + 7
| 6490 | yacpdb | 2009 |
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Tries
- 1.Sc4?
- threat
- 2.Qxc8#
- 1...bxc4
- 2.Bxc4#
- 1...Bb7
- 2.Qa5#
- 1...d6
- 2.Qc6#
- 1...b4!
- threat
- 1.c4?
- 1...Qxh6
- 2.cxb5#
- 1...bxc4
- 2.Bxc4#
- 1...Qb6
- 2.Qxc8#
- 2.cxb5#
- 1...Qc6
- 2.cxb5#
- 1...Qd6
- 2.cxb5#
- 1...Qf6
- 2.cxb5#
- 1...Qg6
- 2.cxb5#
- 1...Bb7
- 2.Qxb7#
- 1...d5
- 2.cxb5#
- 1...d6
- 2.Qc6#
- 1...b4!
- 1...Qxh6
- 1.Sc4?
- Keys
- 1.Sb3!
- 1...Qxh6
- 2.Sc5#
- 1...Qb6
- 2.Qxc8#
- 1...Qc6
- 2.Sc5#
- 1...Qd6
- 2.Sc5#
- 1...Qf6
- 2.Sc5#
- 1...Qg6
- 2.Sc5#
- 1...Bb7
- 2.Qa5#
- 1...d5
- 2.Sc5#
- 1...d6
- 2.Qc6#
- 1...Qxh6
- 1.Sb3!
FEATURES
- Static
- TYPE = WHITE_IN_CHECK
- Tries
- Try
- S(E);N_PINP(a),P_SPINS(E)
- Threat
- QAB(G),XB(g)
- Vars
- P(a);OGATE,P_SPINP(a),XS(E)::B(A),XP(a)
- B(g);SBLOCK::QAR1(G)
- P(e);N_GUARD,N_SPINQ(c),S_CUTQ(c)::QAR2(G)
- Refutation
- P(a);
- Try
- P(D);N_PINP(a),P_SPINP(D)
- Vars
- Q(c);N_PINP(D),N_SPINQ(c),XR(F)::P(D),XP(a)
- P(a);OGATE,P_SPINP(a),XP(D)::B(A),XP(a)
- Q(c);N_PINP(D)::P(D),XP(a)
- B(g);N_GUARD::QAB1(G),XB(g)
- P(e);N_PINP(D)::P(D),XP(a)
- P(e);N_GUARD,N_SPINQ(c),S_CUTQ(c)::QAR2(G)
- Refutation
- P(a);
- Try
- Actual
- S(E);P_SPINS(E)
- Vars
- Q(c);N_PINS(E),N_SPINQ(c),XR(F)::S(E)
- Q(c);N_PINS(E)::QAB(G),XB(g)
- Q(c);N_PINS(E)::S(E)
- B(g);SBLOCK::QAR1(G)
- P(e);N_PINS(E)::S(E)
- P(e);N_GUARD,N_SPINQ(c),S_CUTQ(c)::QAR2(G)
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).