MESON Chess Problem Database
Problem Display
PID: 247699 (7Q/4KN2/3P2P1/5pPb/6k1/3P4/5B2/4N3 w - - 0 1)
Stewart, John
5th HM., Stratford Express, 1949
#2
9 + 3
| 14867 | BCPS Library | 2021 |
| 5454 | Near Snap | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kh3
- 2.Qxh5#
- 1...Kf4
- 2.Qd4#
- 1...Bxg6
- 2.Qh4#
- 1...f4
- 2.Qc8#
- 1...Kh3
- Tries
- 1.Ke6?
- 1...Kh3
- 2.Qxh5#
- 1...Kf4
- 2.Qd4#
- 1...Bxg6
- 2.Qh4#
- 1...f4!
- 1...Kh3
- 1.Kf6?
- 1...Kh3
- 2.Qxh5#
- 1...Bxg6
- 2.Qh4#
- 1...f4
- 2.Qc8#
- 1...Kf4!
- 1...Kh3
- 1.Kd7?
- 1...Kh3
- 2.Qxh5#
- 1...Kf4
- 2.Qd4#
- 1...Bxg6
- 2.Qh4#
- 1...f4!
- 1...Kh3
- 1.Kd8?
- 1...Kh3
- 2.Qxh5#
- 1...Kf4
- 2.Qd4#
- 1...Bxg6
- 2.Qh4#
- 1...f4!
- 1...Kh3
- 1.Ke8?
- 1...Kh3
- 2.Qxh5#
- 1...Kf4
- 2.Qd4#
- 1...Bxg6
- 2.Qh4#
- 1...f4!
- 1...Kh3
- 1.Kf8?
- 1...Kh3
- 2.Qxh5#
- 1...Kf4
- 2.Qd4#
- 1...Bxg6
- 2.Qh4#
- 1...f4!
- 1...Kh3
- 1.Qd4+?
- 1...Kh3
- 2.Qh4#
- 1...f4!
- 1...Kh3
- 1.Qe5?
- threat
- 2.Qg3#
- 1...Kh3
- 2.Qg3#
- 1...f4
- 2.Qe6#
- 1...Bxg6!
- threat
- 1.Qxh5+?
- 1...Kf4
- 2.Sg2#
- 2.Qf3#
- 2.Qh4#
- 1...Kxh5!
- 1...Kf4
- 1.d4?
- 1...Kh3
- 2.Qxh5#
- 1...Bxg6
- 2.Qh4#
- 1...f4
- 2.Qc8#
- 1...Kf4!
- 1...Kh3
- 1.d7?
- 1...Kh3
- 2.Qxh5#
- 1...Kf4
- 2.Qd4#
- 1...Bxg6
- 2.Qh4#
- 1...f4!
- 1...Kh3
- 1.g7?
- 1...Kh3
- 2.Qxh5#
- 1...Bxf7
- 2.Qh4#
- 1...f4
- 2.Qc8#
- 1...Bg6
- 2.Qh4#
- 1...Kf4!
- 1...Kh3
- 1.Ke6?
- Keys
- 1.Qa8!
- threat
- 2.Qf3#
- 1...Kh3
- 2.Qg2#
- 1...Kf4
- 2.Qa4#
- 1...f4
- 2.Qc8#
- threat
- 1.Qa8!
Anticipated by 181085(1904), 194214(1917)
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- K(a);P-FLIGHT::QAR2(I)
- B(c);OGATE,XP(F)::QAR1(I)
- P(b);OGATEB,SBLOCK::QAB(I)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- K(a);P-FLIGHT::QAR2(I)
- B(c);OGATE,XP(F)::QAR1(I)
- Refutation
- P(b);
- Try
- K(G);S_FLIGHT
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- B(c);OGATE,XP(F)::QAR1(I)
- P(b);OGATEB,SBLOCK::QAB(I)
- Refutation
- K(a);P-FLIGHT
- Try
- K(G);P-FLIGHT
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- K(a);P-FLIGHT::QAR2(I)
- B(c);OGATE,XP(F)::QAR1(I)
- Refutation
- P(b);
- Try
- K(G);S_FLIGHT
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- K(a);P-FLIGHT::QAR2(I)
- B(c);OGATE,XP(F)::QAR1(I)
- Refutation
- P(b);
- Try
- K(G);P-FLIGHT
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- K(a);P-FLIGHT::QAR2(I)
- B(c);OGATE,P_PINS(H),XP(F)::QAR1(I)
- Refutation
- P(b);
- Try
- K(G);S_FLIGHT
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- K(a);P-FLIGHT::QAR2(I)
- B(c);OGATE,XP(F)::QAR1(I)
- Refutation
- P(b);
- Try
- Q(I);CHECK
- Vars
- K(a);OGATE,S_FLIGHT::QAR1(I)
- Refutation
- P(b);P_SPINP(b)
- Try
- Q(I);
- Threat
- QAR1(I)
- Vars
- K(a);S_FLIGHT::QAR1(I)
- P(b);OGATEB,SBLOCK::QAB(I)
- Refutation
- B(c);XP(F)
- Try
- Q(I);CHECK,XB(c)
- Refutation
- K(a);S_FLIGHT,XQ(I)
- Try
- P(C);
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- B(c);OGATE,XP(F)::QAR1(I)
- P(b);OGATEB,SBLOCK::QAB(I)
- Refutation
- K(a);P-FLIGHT
- Try
- P(E);
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- K(a);P-FLIGHT::QAR2(I)
- B(c);OGATE,XP(F)::QAR1(I)
- Refutation
- P(b);
- Try
- P(F);
- Vars
- K(a);P_SPINB(c),S_FLIGHT::QAR2(I),XB(c)
- B(c);OGATE,XS(H)::QAR1(I)
- P(b);OGATEB,SBLOCK::QAB(I)
- B(c);OGATE::QAR1(I)
- Refutation
- K(a);P-FLIGHT
- Try
- Actual
- Q(I);
- Threat
- QAB1(I)
- Vars
- K(a);S_FLIGHT::QAB1(I)
- K(a);P-FLIGHT::QAR(I)
- P(b);OGATEB,SBLOCK::QAB(I)
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).