MESON Chess Problem Database
Problem Display
PID: 150593 (8/4p1Q1/4BrP1/8/4kpK1/5N2/3PP3/8 w - - 0 1)
Akerblom, Johan Axel
Schackvarlden, 1942
#2
7 + 4
| 15148 | Sadier Collection | 2014 |
| 5454 | Near Snap | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rf5
- 2.Qd4#
- 1...Rxe6
- 2.Qd4#
- 1...Rxg6+
- 2.Qxg6#
- 1...Rf7
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rf5
- Tries
- 1.Kh3?
- 1...Rxg6
- 2.Qd4#
- 2.Qe5#
- 2.Qxg6#
- 1...Rf5
- 2.Qd4#
- 1...Rf7
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rxe6!
- 1...Rxg6
- 1.Kh4?
- 1...Rxg6
- 2.Qd4#
- 2.Qe5#
- 2.Qxg6#
- 1...Rf5
- 2.Qd4#
- 1...Rf7
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rxe6!
- 1...Rxg6
- 1.Kg5?
- 1...Rxg6+
- 2.Qxg6#
- 1...Rxe6
- 2.Qd4#
- 1...Rf7
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Qd4#
- 2.Qe5#
- 1...Rf5+!
- 1...Rxg6+
- 1.Ba2?
- 1...Rxg6+
- 2.Qxg6#
- 1...Rf5
- 2.Qd4#
- 1...Ra6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rb6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rc6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rd6
- 2.Sg5#
- 2.Qe5#
- 1...Re6
- 2.Sg5#
- 2.Qd4#
- 1...Rf7
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 2.Qxe7#
- 1...e6
- 2.Qb7#
- 1...e5!
- 1...Rxg6+
- 1.Bb3?
- 1...Rxg6+
- 2.Qxg6#
- 1...Rf5
- 2.Qd4#
- 1...Ra6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rb6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rc6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rd6
- 2.Sg5#
- 2.Qe5#
- 1...Re6
- 2.Sg5#
- 2.Qd4#
- 1...Rf7
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 2.Qxe7#
- 1...e6
- 2.Qb7#
- 1...e5!
- 1...Rxg6+
- 1.Bc4?
- 1...Rxg6+
- 2.Qxg6#
- 1...Rf5
- 2.Qd4#
- 1...Ra6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rb6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rc6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rd6
- 2.Sg5#
- 2.Qe5#
- 1...Re6
- 2.Sg5#
- 2.Qd4#
- 1...Rf7
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 2.Qxe7#
- 1...e6
- 2.Qb7#
- 1...e5!
- 1...Rxg6+
- 1.Bf5+?
- 1...Rxf5
- 2.Qd4#
- 1...Kd5!
- 1...Rxf5
- 1.Bg8?
- 1...Rxg6+
- 2.Qxg6#
- 1...Re6
- 2.Qd4#
- 1...Rf7
- 2.Qd4#
- 2.Qe5#
- 1...e6
- 2.Qb7#
- 1...Rf5
- 2.Qd4#
- 1...Ra6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rb6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rc6
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rd6
- 2.Sg5#
- 2.Qe5#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 2.Qxe7#
- 1...e5!
- 1...Rxg6+
- 1.Qh8?
- threat
- 2.Qa8#
- 1...Rxe6
- 2.Qd4#
- 1...Rf5
- 2.Qd4#
- 1...Rf8
- 2.Sg5#
- 2.Qd4#
- 2.Qe5#
- 1...Rxg6+!
- threat
- 1.Qxe7?
- threat
- 2.Qb4#
- 2.Qb7#
- 1...Rxe6
- 2.Qxe6#
- 1...Rf5
- 2.Qb4#
- 1...Rf7
- 2.Bxf7#
- 2.Qb4#
- 1...Rxg6+!
- threat
- 1.Qf7?
- threat
- 2.Bd5#
- 1...Rxg6+
- 2.Qxg6#
- 1...Rxe6
- 2.Qxe6#
- 2.Qf5#
- 1...Rf5
- 2.Bxf5#
- 2.Qxf5#
- 1...Rxf7!
- threat
- 1.Kh3?
- Keys
- 1.Qg8!
- threat
- 2.Bd5#
- 2.Qa8#
- 1...Rxg6+
- 2.Qxg6#
- 1...Rxe6
- 2.Qxe6#
- 1...Rf5
- 2.Bxf5#
- 1...Rf7
- 2.Qa8#
- 1...Rf8
- 2.Bd5#
- threat
- 1.Qg8!
This anticipates 182446(1953)
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(c);OGATE::QAR1(G)
- R(c);OGATE,XB(E)::QAR1(G)
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- R(c);OGATE::QAR1(G)
- Refutation
- R(c);XB(E)
- Try
- K(D);P-FLIGHT
- Vars
- R(c);OGATE::QAR1(G)
- Refutation
- R(c);XB(E)
- Try
- K(D);P-FLIGHT
- Vars
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- R(c);OGATE,XB(E)::QAR1(G)
- Refutation
- R(c);CHECK
- Try
- B(E);
- Vars
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- R(c);OGATE::QAR1(G)
- P(d);OGATE::QAB(G)
- Refutation
- P(d);
- Try
- B(E);
- Vars
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- R(c);OGATE::QAR1(G)
- P(d);OGATE::QAB(G)
- Refutation
- P(d);
- Try
- B(E);
- Vars
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- R(c);OGATE::QAR1(G)
- P(d);OGATE::QAB(G)
- Refutation
- P(d);
- Try
- B(E);CHECK
- Vars
- R(c);OGATE,XB(E)::QAR1(G)
- Refutation
- K(a);S_FLIGHT
- Try
- B(E);
- Vars
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- R(c);OGATE::QAR1(G)
- P(d);OGATE::QAB(G)
- Refutation
- P(d);
- Try
- Q(G);
- Threat
- QAB(G)
- Vars
- R(c);OGATE,XB(E)::QAR1(G)
- R(c);OGATE::QAR1(G)
- Refutation
- R(c);CHECK,XP(F)
- Try
- Q(G);XP(d)
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,P_SPINR(c),XB(E)::QAR2(G),XR(c)
- R(c);::QAR(G)
- Refutation
- R(c);CHECK,XP(F)
- Try
- Q(G);
- Threat
- B(E)
- Vars
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- Refutation
- R(c);XQ(G)
- Try
- Actual
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,XP(F)::QAB(G),XR(c)
- R(c);OGATE,XB(E)::QAR2(G),XR(c)
- R(c);N_GUARD::B(E),XR(c)
- R(c);::QAB(G)
- R(c);::B(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).