MESON Chess Problem Database
Problem Display
PID: 236063 (7n/5q2/1R4p1/N3kpP1/3p1N2/1p2PP2/1K6/1Q6 w - - 0 1)
Shtern, David
Variantim, 2017
#2
8 + 7
SOLUTION
- SOUND
- Sets
- 1...Qc4
- 2.Sxc4#
- 1...Qd5
- 2.Sd3#
- 1...Qe6
- 2.Rxe6#
- 1...Qe8
- 2.Sc4#
- 1...Qf6
- 2.Sc4#
- 1...Qa7
- 2.Sc4#
- 2.Re6#
- 1...Qb7
- 2.Sc4#
- 2.Re6#
- 1...Qc7
- 2.Re6#
- 1...Qd7
- 2.Sc4#
- 1...Qe7
- 2.Sc4#
- 1...Qg7
- 2.Sc4#
- 2.Re6#
- 1...Qh7
- 2.Sc4#
- 2.Re6#
- 1...Qf8
- 2.Sc4#
- 2.Re6#
- 1...Qc4
- Tries
- 1.Rb5+?
- 1...Qd5
- 2.Sc4#
- 2.Rxd5#
- 1...Kd6!
- 1...Qd5
- 1.Rf6?
- threat
- 2.Sc6#
- 1...Qxf6
- 2.Sc4#
- 1...Qe6
- 2.Rxe6#
- 1...Qc4
- 2.Sxc4#
- 1...Qd5
- 2.Sd3#
- 1...Qe8
- 2.Sc4#
- 1...Qb7
- 2.Sc4#
- 2.Re6#
- 1...Qc7
- 2.Re6#
- 1...Qd7
- 2.Sc4#
- 1...dxe3!
- threat
- 1.Qd3?
- threat
- 2.Qxd4#
- 1...dxe3
- 2.Qxe3#
- 2.Qd6#
- 1...Qc4
- 2.Sxc4#
- 1...Qd7
- 2.Sc4#
- 1...Qd5!
- threat
- 1.Qd1?
- threat
- 2.Qxd4#
- 1...dxe3
- 2.Qd6#
- 1...Qc4
- 2.Sxc4#
- 1...Qd5
- 2.Sd3#
- 1...Qd7
- 2.Sc4#
- 1...d3!
- threat
- 1.Qe1?
- 1...dxe3
- 2.Qxe3#
- 1...Qc4
- 2.Sxc4#
- 1...Qd5
- 2.Sd3#
- 1...Qe6
- 2.Rxe6#
- 1...Qe8
- 2.Sc4#
- 1...Qf6
- 2.Sc4#
- 1...Qa7
- 2.Sc4#
- 2.Re6#
- 1...Qb7
- 2.Sc4#
- 2.Re6#
- 1...Qc7
- 2.Re6#
- 1...Qd7
- 2.Sc4#
- 1...Qe7
- 2.Sc4#
- 1...Qg7
- 2.Sc4#
- 2.Re6#
- 1...Qh7
- 2.Sc4#
- 2.Re6#
- 1...Qf8
- 2.Sc4#
- 2.Re6#
- 1...d3
- 2.Qc3#
- 1...Qg8!
- 1...dxe3
- 1.Rb5+?
- Keys
- 1.Qc1!
- 1...dxe3
- 2.Qxe3#
- 1...Qg8
- 2.Qc7#
- 1...Qc4
- 2.Sxc4#
- 1...Qd5
- 2.Sd3#
- 1...Qe6
- 2.Rxe6#
- 1...Qe8
- 2.Sc4#
- 2.Qc5#
- 2.Qc7#
- 1...Qf6
- 2.Sc4#
- 2.Qc5#
- 1...Qa7
- 2.Sc4#
- 2.Re6#
- 2.Qc5#
- 1...Qb7
- 2.Sc4#
- 2.Re6#
- 1...Qc7
- 2.Re6#
- 2.Qxc7#
- 1...Qd7
- 2.Sc4#
- 1...Qe7
- 2.Sc4#
- 1...Qg7
- 2.Sc4#
- 2.Re6#
- 2.Qc5#
- 1...Qh7
- 2.Sc4#
- 2.Re6#
- 2.Qc5#
- 1...Qf8
- 2.Sc4#
- 2.Re6#
- 1...d3
- 2.Qc3#
- 1...dxe3
- 1.Qc1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(f);N_GUARD::S(F),XQ(f)
- Q(f);SBLOCK::S(E)
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD::R1(H)
- Tries
- Try
- R(H);CHECK
- Refutation
- K(c);S_FLIGHT
- Try
- R(H);
- Threat
- S(F)
- Vars
- Q(f);N_GUARD,XR(H)::S(F)
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(F),XQ(f)
- Q(f);SBLOCK::S(E)
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD::R1(H)
- Refutation
- P(b);XP(C)
- Try
- Q(A);
- Threat
- QAB1(A),XP(b)
- Vars
- Q(f);N_GUARD::S(F),XQ(f)
- Q(f);N_GUARD::S(F)
- Refutation
- Q(f);
- Try
- Q(A);
- Threat
- QAB1(A),XP(b)
- Vars
- P(b);OGATE,XP(C)::QAB1(A)
- Q(f);N_GUARD::S(F),XQ(f)
- Q(f);SBLOCK::S(E)
- Q(f);N_GUARD::S(F)
- Refutation
- P(b);
- Try
- Q(A);
- Vars
- P(b);OGATE,P_SPINP(b),XP(C)::QAR2(A),XP(b)
- Q(f);N_GUARD::S(F),XQ(f)
- Q(f);SBLOCK::S(E)
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD::R1(H)
- P(b);OGATEB::QAB(A)
- Refutation
- Q(f);
- Try
- Actual
- Q(A);
- Vars
- P(b);OGATE,XP(C)::QAR2(A),XP(b)
- Q(f);N_GUARD::QAB(A)
- Q(f);N_GUARD::S(F),XQ(f)
- Q(f);SBLOCK::S(E)
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(F)
- P(b);OGATEB::QAB(A)
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).