MESON Chess Problem Database
Problem Display
PID: 15563 (B7/4pp2/6p1/2P1kPQ1/2K4p/8/4N3/4n3 w - - 0 1)
Rychkov, Vladimir Nikolaevich
Sp. Prize, Sverdlovsk 25. Ty., 1985
#2
6 + 6
SOLUTION
- SOUND
- Sets
- 1...gxf5
- 2.Qxe7#
- 1...e6
- 2.f6#
- 1...f6
- 2.Qf4#
- 1...gxf5
- Tries
- 1.Sf4?
- threat
- 2.f6#
- 1...Sf3
- 2.Sd3#
- 1...f6
- 2.Sxg6#
- 1...gxf5!
- threat
- 1.Be4?
- threat
- 2.Qxe7#
- 1...Kxe4
- 2.Qf4#
- 1...f6
- 2.Qf4#
- 1...e6!
- threat
- 1.Bd5?
- threat
- 2.f6#
- 1...gxf5
- 2.Qxe7#
- 1...f6
- 2.Qf4#
- 1...Sf3!
- threat
- 1.fxg6+?
- 1...f5
- 2.Qxe7#
- 1...Ke6!
- 1...f5
- 1.Sf4?
- Keys
- 1.Sd4!
- threat
- 2.f6#
- 1...gxf5
- 2.Qxf5#
- 1...Sf3
- 2.Sxf3#
- 1...f6
- 2.Qe3#
- threat
- 1.Sd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- P(d);P_SPINP(d),SBLOCK,XP(D)::QAR2(E),XP(e)
- P(e);SBLOCK::QAR(E)+P(D)
- P(f);SBLOCK::QAB1(E)
- Tries
- Try
- S(A);
- Threat
- QAR(E)+P(D)
- Vars
- S(a);N_GUARD::S(A)
- P(f);N_GUARD::S(A),XP(d)
- Refutation
- P(d);P_SPINP(d),XP(D)
- Try
- B(F);
- Threat
- QAR2(E),XP(e)
- Vars
- K(c);P-FLIGHT,XB(F)::QAR1(E)
- P(f);SBLOCK::QAB1(E)
- Refutation
- P(e);
- Try
- B(F);
- Threat
- QAR(E)+P(D)
- Vars
- P(d);P_SPINP(d),SBLOCK,XP(D)::QAR2(E),XP(e)
- P(f);SBLOCK::QAB1(E)
- Refutation
- S(a);
- Try
- P(D);CHECK,XP(d)
- Vars
- P(f);P_SPINP(f),SBLOCK::QAR2(E),XP(e)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- S(A);
- Threat
- QAR(E)+P(D)
- Vars
- P(d);OGATE,P_SPINP(d),XP(D)::QAR1(E),XP(d)
- S(a);N_GUARD::S(A),XS(a)
- P(f);SBLOCK::QAR2(E)
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).