MESON Chess Problem Database
Problem Display
PID: 76573 (4qr2/Q2PR3/3k2b1/2R2n2/K4N2/8/8/8 w - - 0 1)
Havel, Miroslav
HM., Algemeen Handelsblad, 1917-1918
#2
6 + 5
| 756 | Norsk Sjakkblad | 1919 |
| 6024 | Bohemian Garnets | 1923 |
SOLUTION
- SOUND
- Sets
- 1...Qxd7+
- 2.Rxd7#
- 1...Qxe7
- 2.Qc7#
- 1...Qa8
- 2.Re6#
- 1...Qb8
- 2.Re6#
- 1...Qc8
- 2.Re6#
- 1...Qd8
- 2.Re6#
- 1...Rf7
- 2.dxe8S#
- 1...Sxe7
- 2.Qc7#
- 1...Qxd7+
- Tries
- 1.Rc1?
- threat
- 2.Qc5#
- 1...Qxd7+
- 2.Qxd7#
- 1...Qxe7
- 2.Qc7#
- 1...Sxe7
- 2.Qc7#
- 1...Qa8
- 2.Re6#
- 1...Qc8
- 2.Re6#
- 1...Kxe7!
- threat
- 1.Rc2?
- threat
- 2.Qc5#
- 1...Qxd7+
- 2.Qxd7#
- 1...Qxe7
- 2.Qc7#
- 1...Sxe7
- 2.Qc7#
- 1...Qa8
- 2.Re6#
- 1...Qc8
- 2.Re6#
- 1...Kxe7!
- threat
- 1.Rc3?
- threat
- 2.Qc5#
- 1...Qxd7+
- 2.Qxd7#
- 1...Qxe7
- 2.Qc7#
- 1...Sxe7
- 2.Qc7#
- 1...Qa8
- 2.Re6#
- 1...Qc8
- 2.Re6#
- 1...Kxe7!
- threat
- 1.Rc4?
- threat
- 2.Qc5#
- 1...Qxd7+
- 2.Qxd7#
- 1...Qxe7
- 2.Qc7#
- 1...Sxe7
- 2.Qc7#
- 1...Qa8
- 2.Re6#
- 1...Qc8
- 2.Re6#
- 1...Kxe7!
- threat
- 1.dxe8Q?
- threat
- 2.Rd5#
- 2.Rc6#
- 2.Re6#
- 2.Rd7#
- 2.Qb6#
- 2.Qc6#
- 2.Qed7#
- 2.Qc7#
- 1...Rxe8
- 2.Rd7#
- 2.Qc7#
- 1...Sxe7
- 2.Qed7#
- 2.Qc7#
- 2.Qaxe7#
- 2.Qexe7#
- 1...Rf6
- 2.Rd5#
- 2.Rc6#
- 2.Rd7#
- 2.Qb6#
- 2.Qc6#
- 2.Qed7#
- 2.Qc7#
- 2.Qeb8#
- 2.Qd8#
- 1...Rf7
- 2.Rd5#
- 2.Rc6#
- 2.Re6#
- 2.Qb6#
- 2.Qc6#
- 2.Qed7#
- 2.Qc7#
- 2.Qeb8#
- 2.Qd8#
- 1...Bf7
- 2.Rc6#
- 2.Rd7#
- 2.Qb6#
- 2.Qc6#
- 2.Qed7#
- 2.Qc7#
- 1...Se3
- 2.Rc6#
- 2.Re6#
- 2.Rd7#
- 2.Qb6#
- 2.Qc6#
- 2.Qed7#
- 2.Qc7#
- 1...Sd4
- 2.Rd5#
- 2.Rd7#
- 2.Qed7#
- 2.Qc7#
- 1...Sg7
- 2.Rd5#
- 2.Rc6#
- 2.Rd7#
- 2.Qb6#
- 2.Qc6#
- 2.Qed7#
- 2.Qc7#
- 1...Bxe8+!
- threat
- 1.dxe8S+?
- 1...Rxe8
- 2.Rd7#
- 2.Qc7#
- 1...Bxe8+!
- 1...Rxe8
- 1.dxe8B?
- threat
- 2.Rd5#
- 2.Rc6#
- 2.Re6#
- 2.Rd7#
- 2.Qc7#
- 1...Rxe8
- 2.Rd7#
- 2.Qc7#
- 1...Sxe7
- 2.Qc7#
- 1...Rf6
- 2.Rd5#
- 2.Rc6#
- 2.Rd7#
- 2.Qc7#
- 1...Rf7
- 2.Rd5#
- 2.Rc6#
- 2.Re6#
- 2.Qc7#
- 1...Bf7
- 2.Rc6#
- 2.Rd7#
- 2.Qc7#
- 1...Se3
- 2.Rc6#
- 2.Re6#
- 2.Rd7#
- 2.Qc7#
- 1...Sd4
- 2.Rd5#
- 2.Rd7#
- 2.Qc7#
- 1...Sg7
- 2.Rd5#
- 2.Rc6#
- 2.Rd7#
- 2.Qc7#
- 1...Bxe8+!
- threat
- 1.dxe8R?
- threat
- 2.Re6#
- 2.Rd7#
- 2.Qb6#
- 2.Qc7#
- 1...Rxe8
- 2.Rd7#
- 2.Qc7#
- 1...Sxe7
- 2.Qc7#
- 2.Qxe7#
- 1...Rf6
- 2.Rd7#
- 2.Rd8#
- 2.Qb6#
- 2.Qc7#
- 1...Rf7
- 2.Re6#
- 2.Rd8#
- 2.Qb6#
- 2.Qc7#
- 1...Bf7
- 2.Rd7#
- 2.Qb6#
- 2.Qc7#
- 1...Sd4
- 2.Rd7#
- 2.Qc7#
- 1...Sg7
- 2.Rd7#
- 2.Qb6#
- 2.Qc7#
- 1...Bxe8+!
- threat
- 1.Rc1?
- Keys
- 1.Rc8!
- threat
- 2.Qc5#
- 1...Qxd7+
- 2.Qxd7#
- 1...Kxe7
- 2.dxe8S#
- 1...Qxe7
- 2.Qc7#
- 1...Qxc8
- 2.Re6#
- 1...Sxe7
- 2.Qc7#
- threat
- 1.Rc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- Q(d);CHECK,OGATE,XP(E)::R1(F),XQ(d)
- Q(d);N_PINP(E),SBLOCK,XR(F)::QAB1(D)
- Q(d);N_GUARD,N_PINP(E),P_PINQ(D)::R1(F)
- Q(d);N_GUARD,N_PINP(E)::R1(F)
- R(e);N_GUARD,S_CUTB(c)::PXQ(d)=S
- S(a);SBLOCK,XR(F)::QAB1(D)
- Tries
- Try
- R(C);
- Threat
- QAB1(D)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(D),XQ(d)
- Q(d);N_PINP(E),SBLOCK,XR(F)::QAB1(D)
- S(a);SBLOCK,XR(F)::QAB1(D)
- Q(d);N_GUARD,N_PINP(E),P_PINQ(D)::R1(F)
- Q(d);N_GUARD,N_PINP(E)::R1(F)
- Refutation
- K(b);S_FLIGHT,XR(F)
- Try
- R(C);
- Threat
- QAB1(D)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(D),XQ(d)
- Q(d);N_PINP(E),SBLOCK,XR(F)::QAB1(D)
- S(a);SBLOCK,XR(F)::QAB1(D)
- Q(d);N_GUARD,N_PINP(E),P_PINQ(D)::R1(F)
- Q(d);N_GUARD,N_PINP(E)::R1(F)
- Refutation
- K(b);S_FLIGHT,XR(F)
- Try
- R(C);
- Threat
- QAB1(D)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(D),XQ(d)
- Q(d);N_PINP(E),SBLOCK,XR(F)::QAB1(D)
- S(a);SBLOCK,XR(F)::QAB1(D)
- Q(d);N_GUARD,N_PINP(E),P_PINQ(D)::R1(F)
- Q(d);N_GUARD,N_PINP(E)::R1(F)
- Refutation
- K(b);S_FLIGHT,XR(F)
- Try
- R(C);
- Threat
- QAB1(D)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(D),XQ(d)
- Q(d);N_PINP(E),SBLOCK,XR(F)::QAB1(D)
- S(a);SBLOCK,XR(F)::QAB1(D)
- Q(d);N_GUARD,N_PINP(E),P_PINQ(D)::R1(F)
- Q(d);N_GUARD,N_PINP(E)::R1(F)
- Refutation
- K(b);S_FLIGHT,XR(F)
- Try
- P(E);N_SPINP(E),XQ(d)
- Threat
- DUALS(8)
- Refutation
- B(c);CHECK,XQ(E)
- Try
- P(E);CHECK,N_SPINP(E),XQ(d)
- Refutation
- B(c);CHECK,XS(E)
- Try
- P(E);N_SPINP(E),XQ(d)
- Threat
- DUALS(5)
- Vars
- S(a);XR(F)::QAB1(D)
- Refutation
- B(c);CHECK,XB(E)
- Try
- P(E);N_SPINP(E),XQ(d)
- Threat
- DUALS(4)
- Refutation
- B(c);CHECK,XR(E)
- Try
- Actual
- R(C);
- Threat
- QAB1(D)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(D),XQ(d)
- K(b);S_FLIGHT,XR(F)::PXQ(d)=S
- Q(d);N_PINP(E),SBLOCK,XR(F)::QAB1(D)
- Q(d);N_GUARD,N_PINP(E),XR(C)::R1(F)
- S(a);SBLOCK,XR(F)::QAB1(D)
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).