MESON Chess Problem Database
Problem Display
PID: 229344 (4r1NB/p5P1/P7/3pk3/RQ3NP1/PKp5/P1P5/8 w - - 0 1)
Ouellet, Charles
The Problemist, 2020
#2
12 + 5
SOLUTION
- SOUND
- Sets
- 1...Re6
- 2.Sd3#
- 1...Re7
- 2.Qxe7#
- 1...Ra8
- 2.Qe7#
- 1...Rb8
- 2.Qxb8#
- 1...Rc8
- 2.Qe7#
- 1...Rd8
- 2.Qe7#
- 1...Rf8
- 2.Qe7#
- 2.gxf8Q#
- 2.gxf8S#
- 2.gxf8B#
- 2.gxf8R#
- 1...Rxg8
- 2.Qe7#
- 1...d4
- 2.Qxd4#
- 1...Re6
- Tries
- 1.Kxc3?
- 1...d4+
- 2.Qxd4#
- 1...Rxg8
- 2.Qe7#
- 1...Re6
- 2.Sd3#
- 1...Re7
- 2.Qxe7#
- 1...Ra8
- 2.Qe7#
- 1...Rb8
- 2.Qe7#
- 2.Qxb8#
- 1...Rd8
- 2.Qe7#
- 1...Rf8
- 2.Qe7#
- 2.gxf8Q#
- 2.gxf8S#
- 2.gxf8B#
- 2.gxf8R#
- 1...Rc8+!
- 1...d4+
- 1.Sh6?
- threat
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Kf6
- 2.g8Q#
- 2.g8R#
- 1...Rxh8
- 2.Qe7#
- 2.gxh8Q#
- 2.gxh8B#
- 1...d4
- 2.Qxd4#
- 1...Re7
- 2.Qxe7#
- 1...Ra8
- 2.Qe7#
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rb8
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rc8
- 2.Qe7#
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rd8
- 2.Qe7#
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rf8
- 2.Qe7#
- 2.gxf8Q#
- 2.gxf8S#
- 2.gxf8B#
- 2.gxf8R#
- 1...Rg8
- 2.Qe7#
- 1...Re6!
- threat
- 1.Se7?
- threat
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Kf6
- 2.g8Q#
- 1...Rxe7
- 2.Qxe7#
- 1...Rxh8
- 2.gxh8Q#
- 2.gxh8B#
- 1...d4
- 2.Qxd4#
- 1...Ra8
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rb8
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rc8
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rd8
- 2.g8Q#
- 2.g8S#
- 2.g8B#
- 2.g8R#
- 1...Rf8
- 2.gxf8Q#
- 2.gxf8S#
- 2.gxf8B#
- 2.gxf8R#
- 1...Rg8!
- threat
- 1.Qxc3+?
- 1...d4
- 2.Qxd4#
- 1...Kd6!
- 1...d4
- 1.Qc5?
- threat
- 2.Qxd5#
- 2.Qc7#
- 1...Rxg8
- 2.Qe7#
- 1...Re6
- 2.Sd3#
- 2.Qxd5#
- 1...Re7
- 2.Qxe7#
- 2.Qxd5#
- 1...Rc8
- 2.Qe7#
- 2.Qxd5#
- 1...Rd8
- 2.Qe7#
- 1...Rb8+!
- threat
- 1.Qf8?
- threat
- 2.Qf6#
- 1...Rb8+
- 2.Qxb8#
- 1...Rxf8
- 2.gxf8Q#
- 2.gxf8B#
- 1...Re6
- 2.Sd3#
- 1...d4!
- threat
- 1.Qb6?
- threat
- 2.Sd3#
- 2.Sg6#
- 2.Qc7#
- 2.Qf6#
- 1...Rxg8
- 2.Sd3#
- 2.Sg6#
- 2.Qe6#
- 1...d4
- 2.Qxd4#
- 1...Re6
- 2.Sd3#
- 2.Qxe6#
- 1...Re7
- 2.Sd3#
- 2.Sg6#
- 2.Qf6#
- 1...Rb8
- 2.Sd3#
- 2.Sg6#
- 2.Qxb8#
- 1...Rc8
- 2.Sd3#
- 2.Sg6#
- 2.Qe6#
- 2.Qf6#
- 1...Rd8
- 2.Sd3#
- 2.Sg6#
- 2.Qe6#
- 2.Qf6#
- 1...Rf8
- 2.Sd3#
- 2.Sg6#
- 2.Qc7#
- 2.Qe6#
- 2.gxf8Q#
- 2.gxf8S#
- 2.gxf8B#
- 2.gxf8R#
- 1...axb6!
- threat
- 1.Kxc3?
- Keys
- 1.Sf6!
- threat
- 2.Sd7#
- 1...Kxf6
- 2.g8Q#
- 1...d4
- 2.Qxd4#
- 1...Re7
- 2.Qxe7#
- 1...Rd8
- 2.Qe7#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- R(e);SBLOCK::S(G)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);N_GUARD::QAR2(F)
- R(e);N_GUARD,P_PINQ(F)::QAB(F),XR(e)
- R(e);N_GUARD,XS(K)::QAR2(F)
- P(b);::QAB1(F),XP(b)
- Tries
- Try
- K(D);P-FLIGHT,XP(a)
- Vars
- P(b);CHECK::QAB1(F),XP(b)
- R(e);N_GUARD,XS(K)::QAR2(F)
- R(e);SBLOCK::S(G)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);N_GUARD::QAR2(F)
- Refutation
- R(e);CHECK
- Try
- S(K);
- Threat
- DUALS(4)
- Vars
- K(c);S_FLIGHT::P=Q
- P(b);::QAB1(F),XP(b)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);N_GUARD::QAR2(F)
- Refutation
- R(e);
- Try
- S(K);
- Threat
- DUALS(4)
- Vars
- K(c);S_FLIGHT::P=Q
- R(e);OGATE,XS(K)::QAR2(F),XR(e)
- R(e);OGATE,XB(L)::PXR(e)=Q
- P(b);::QAB1(F),XP(b)
- Refutation
- R(e);
- Try
- Q(F);CHECK,XP(a)
- Vars
- P(b);P_SPINP(b)::QAB1(F),XP(b)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(F);P_PINP(b)
- Threat
- DUALS(2)
- Vars
- R(e);N_GUARD,XS(K)::QAR2(F)
- R(e);N_GUARD::QAR2(F)
- Refutation
- R(e);CHECK
- Try
- Q(F);
- Threat
- QAB1(F)
- Vars
- R(e);CHECK,OGATE::QAB(F),XR(e)
- R(e);OGATE,XQ(F)::PXR(e)=Q
- R(e);SBLOCK::S(G)
- Refutation
- P(b);
- Try
- Q(F);
- Threat
- DUALS(4)
- Vars
- P(b);::QAB1(F),XP(b)
- Refutation
- P(d);XQ(F)
- Try
- Actual
- S(K);
- Threat
- S(K)
- Vars
- K(c);S_FLIGHT,XS(K)::P=Q
- P(b);::QAB1(F),XP(b)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);N_GUARD::QAR2(F)
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).