MESON Chess Problem Database
Problem Display
PID: 241935 (QR6/8/8/qp6/k7/8/NK6/8 w - - 0 1)
Szentgyorgy, Erno
Magyar Sakkvilag, 1933
#2
4 + 3
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...Qxa8
- 2.Rxa8#
- 1...b4
- 2.Rxb4#
- 1...Qa6
- Tries
- 1.Kc2?
- 1...Ka3
- 2.Qxa5#
- 1...Qxa8
- 2.Rxa8#
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4!
- 1...Ka3
- 1.Rxb5?
- threat
- 2.Sc3#
- 2.Rb4#
- 2.Rxa5#
- 2.Qxa5#
- 1...Qxa8
- 2.Sc3#
- 1...Qa6
- 2.Sc3#
- 2.Qxa6#
- 1...Qa7
- 2.Sc3#
- 1...Kxb5!
- threat
- 1.Rb6?
- 1...Qa6
- 2.Rxa6#
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4
- 2.Rxb4#
- 1...Qxa8!
- 1...Qa6
- 1.Rb7?
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Rxa7#
- 2.Qxa7#
- 1...b4
- 2.Rxb4#
- 1...Qxa8!
- 1...Qa6
- 1.Rc8?
- 1...Qxa8
- 2.Rxa8#
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4!
- 1...Qxa8
- 1.Rd8?
- 1...Qxa8
- 2.Rxa8#
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4!
- 1...Qxa8
- 1.Re8?
- 1...Qxa8
- 2.Rxa8#
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4!
- 1...Qxa8
- 1.Rf8?
- 1...Qxa8
- 2.Rxa8#
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4!
- 1...Qxa8
- 1.Rg8?
- 1...Qxa8
- 2.Rxa8#
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4!
- 1...Qxa8
- 1.Rh8?
- 1...Qxa8
- 2.Rxa8#
- 1...Qa6
- 2.Qxa6#
- 1...Qa7
- 2.Qxa7#
- 1...b4!
- 1...Qxa8
- 1.Qa6?
- 1...b4
- 2.Rxb4#
- 1...Qxa6!
- 1...b4
- 1.Qa7?
- 1...Qa6
- 2.Qxa6#
- 1...b4
- 2.Rxb4#
- 1...Qxa7!
- 1...Qa6
- 1.Kc2?
- Keys
- 1.Qe4+!
- 1...Qb4+
- 2.Qxb4#
- 1...b4
- 2.Sc3#
- 1...Qb4+
- 1.Qe4+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- P(c);OGATE::R1(D),XP(c)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- K(a);P-FLIGHT::QAR2(C),XQ(b)
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Refutation
- P(c);
- Try
- R(D);XP(c)
- Threat
- DUALS(4)
- Vars
- Q(b);N_SPINQ(b),XQ(C)::S(A)
- Q(b);::S(A)
- Refutation
- K(a);N_SPINQ(b),S_FLIGHT,XR(D)
- Try
- R(D);
- Vars
- Q(b);OGATEB::QAR(C),XQ(b)
- P(c);OGATE::R1(D),XP(c)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- R(D);
- Vars
- Q(b);OGATEB::QAR2(C),XQ(b)
- P(c);OGATE::R1(D),XP(c)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- R(D);
- Vars
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- Q(b);N_SPINQ(b),OGATE,XQ(C)::R(D),XQ(b)
- Q(b);OGATEB::QAR2(C),XQ(b)
- Q(b);OGATEB::QAR(C),XQ(b)
- Refutation
- P(c);
- Try
- Q(C);
- Vars
- P(c);OGATE::R1(D),XP(c)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- Q(C);
- Vars
- Q(b);OGATEB::QAR2(C),XQ(b)
- P(c);OGATE::R1(D),XP(c)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- Actual
- Q(C);CHECK,N_PINQ(b)
- Vars
- Q(b);CHECK,N_GUARD,P_SPINQ(b)::QAR1(C),XQ(b)
- P(c);P_SPINP(c)::S(A)
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).