MESON Chess Problem Database
Problem Display
PID: 205593 (n1Q5/3PN2B/2r3PK/3R4/4k3/B4R2/2n1P3/8 w - - 0 1)
van Dooren, Rene
The Problemist, 1984
#2
10 + 4
SOLUTION
- SOUND
- Sets
- 1...Rc3
- 2.g7#
- 1...Rc4
- 2.g7#
- 1...Rc5
- 2.g7#
- 1...Ra6
- 2.Qxc2#
- 1...Rb6
- 2.Qxc2#
- 1...Rd6
- 2.Qxc2#
- 1...Re6
- 2.Qxc2#
- 1...Rf6
- 2.Qxc2#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rc7
- 2.g7#
- 1...Rxc8
- 2.g7#
- 1...Rc3
- Tries
- 1.Bc1?
- threat
- 2.Rf4#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rf6
- 2.Qxc2#
- 1...Se3!
- threat
- 1.Bb2?
- threat
- 2.Re5#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rc3
- 2.g7#
- 1...Rc5
- 2.g7#
- 1...Re6
- 2.Qxc2#
- 1...Sd4!
- threat
- 1.Qxc6?
- threat
- 2.Qxc2#
- 2.Qe6#
- 2.g7#
- 1...Sxa3
- 2.Qe6#
- 2.g7#
- 1...Sa1
- 2.Qa4#
- 2.Qc4#
- 2.Qe6#
- 2.g7#
- 1...Se1
- 2.Qa4#
- 2.Qc4#
- 2.Qe6#
- 2.g7#
- 1...Se3
- 2.Qe6#
- 1...Sb4
- 2.Qc4#
- 2.Qe6#
- 2.g7#
- 1...Sc7
- 2.Qxc2#
- 2.g7#
- 1...Sd4!
- threat
- 1.Qc7?
- threat
- 2.Qf4#
- 2.Qe5#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rxc7
- 2.g7#
- 1...Rd6
- 2.Qxc2#
- 1...Re6
- 2.Qf4#
- 2.Qxc2#
- 1...Rf6
- 2.Qe5#
- 2.Qxc2#
- 1...Sxc7!
- threat
- 1.Qf8?
- threat
- 2.Qf4#
- 2.Qf5#
- 1...Rxg6+
- 2.Bxg6#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sd4
- 2.Qf4#
- 1...Rf6!
- threat
- 1.d8Q?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rxc8
- 2.g7#
- 1...Re6
- 2.Qxe6#
- 2.Qxc2#
- 1...Rf6
- 2.Qxc2#
- 1...Sd4
- 2.Qg4#
- 1...Se3!
- threat
- 1.d8S?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rxc8
- 2.g7#
- 1...Re6
- 2.Qxe6#
- 2.Qxc2#
- 1...Rf6
- 2.Qxc2#
- 1...Sd4
- 2.Qg4#
- 1...Se3!
- threat
- 1.d8B?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rxc8
- 2.g7#
- 1...Re6
- 2.Qxe6#
- 2.Qxc2#
- 1...Rf6
- 2.Qxc2#
- 1...Sd4
- 2.Qg4#
- 1...Se3!
- threat
- 1.d8R?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Rxg6+
- 2.Bxg6#
- 1...Rxc8
- 2.g7#
- 1...Re6
- 2.Qxe6#
- 2.Qxc2#
- 1...Rf6
- 2.Qxc2#
- 1...Sd4
- 2.Qg4#
- 1...Se3!
- threat
- 1.Bc1?
- Keys
- 1.Bd6!
- threat
- 2.g7#
- 1...Rxd6
- 2.Qxc2#
- 1...Se3
- 2.Rf4#
- 1...Sd4
- 2.Re5#
- threat
- 1.Bd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- R(c);N_PINP(E)::B(I)+P(E)
- R(c);OGATE::QAB(J),XS(a)
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);N_PINP(E),XQ(J)::B(I)+P(E)
- Tries
- Try
- B(B);
- Threat
- R1(C)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);OGATE::QAB(J),XS(a)
- Refutation
- S(a);
- Try
- B(B);
- Threat
- R1(D)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);N_PINP(E)::B(I)+P(E)
- R(c);OGATE::QAB(J),XS(a)
- Refutation
- S(a);
- Try
- Q(J);N_SPINP(E),XR(c)
- Threat
- DUALS(3)
- Vars
- S(a);::QAR2(J)
- Refutation
- S(a);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);N_PINP(E),XQ(J)::B(I)+P(E)
- R(c);OGATE::QAB(J),XS(a)
- Refutation
- S(d);XQ(J)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- S(a);::QAR1(J)
- Refutation
- R(c);
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);N_PINP(E),XQ(J)::B(I)+P(E)
- R(c);OGATE::QAB(J),XS(a)
- S(a);::QAR2(J)
- Refutation
- S(a);
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);N_PINP(E),XQ(J)::B(I)+P(E)
- R(c);OGATE::QAB(J),XS(a)
- S(a);::QAR2(J)
- Refutation
- S(a);
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);N_PINP(E),XQ(J)::B(I)+P(E)
- R(c);OGATE::QAB(J),XS(a)
- S(a);::QAR2(J)
- Refutation
- S(a);
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(I),XR(c)
- R(c);N_PINP(E),XQ(J)::B(I)+P(E)
- R(c);OGATE::QAB(J),XS(a)
- S(a);::QAR2(J)
- Refutation
- S(a);
- Try
- Actual
- B(B);N_SPINP(E)
- Threat
- B(I)+P(E)
- Vars
- R(c);OGATE,P_PINP(E),XB(B)::QAB(J),XS(a)
- S(a);SBLOCK::R1(C)
- S(a);SBLOCK::R1(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).