MESON Chess Problem Database
Problem Display
PID: 182775 (6r1/1bN4B/6p1/3p1kBP/5P2/2P2p1P/Q1K1p3/4RN1n w - - 0 1)
Howard, David M
Problem Observer, 2015
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra8
- 2.Bxg6#
- 1...Rb8
- 2.Bxg6#
- 1...Rc8
- 2.Bxg6#
- 1...Rd8
- 2.Bxg6#
- 1...Re8
- 2.Bxg6#
- 1...Rf8
- 2.Bxg6#
- 1...Rh8
- 2.Bxg6#
- 1...Ba6
- 2.Qxd5#
- 1...Bc8
- 2.Qxd5#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...exf1Q
- 2.Re5#
- 1...exf1S
- 2.Re5#
- 1...exf1B
- 2.Re5#
- 1...exf1R
- 2.Re5#
- 1...d4
- 2.Qe6#
- 1...Ra8
- Tries
- 1.Kb1?
- threat
- 2.Qc2#
- 1...Ke4
- 2.Qc2#
- 1...exf1B
- 2.Re5#
- 1...Re8
- 2.Bxg6#
- 1...Ba6
- 2.Qxd5#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...d4
- 2.Qe6#
- 1...exf1Q!
- threat
- 1.Kc1?
- threat
- 2.Qb1#
- 2.Qc2#
- 1...Ke4
- 2.Qb1#
- 2.Qc2#
- 1...exf1B
- 2.Re5#
- 1...Re8
- 2.Bxg6#
- 1...Ba6
- 2.Qxd5#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...d4
- 2.Qe6#
- 1...exf1Q!
- threat
- 1.Kd2?
- threat
- 2.Qb1#
- 2.Qc2#
- 1...Ke4
- 2.Qb1#
- 2.Qc2#
- 1...exf1Q
- 2.Re5#
- 1...exf1B
- 2.Re5#
- 1...Re8
- 2.Bxg6#
- 1...Ba6
- 2.Qxd5#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...d4
- 2.Qe6#
- 1...exf1S+!
- threat
- 1.Rxe2?
- threat
- 2.Re5#
- 1...Re8
- 2.Bxg6#
- 1...fxe2!
- threat
- 1.Qc4?
- threat
- 2.Se3#
- 2.Qd3#
- 1...exf1Q
- 2.Re5#
- 1...exf1S
- 2.Re5#
- 2.Qd3#
- 1...exf1B
- 2.Re5#
- 1...exf1R
- 2.Re5#
- 2.Qd3#
- 1...d4
- 2.Qe6#
- 1...Re8
- 2.Bxg6#
- 1...Ba6
- 2.Se3#
- 2.Qxd5#
- 1...Sf2
- 2.Se3#
- 2.Sg3#
- 1...Sg3
- 2.Se3#
- 2.Sxg3#
- 1...dxc4!
- threat
- 1.Qa4?
- threat
- 2.Se3#
- 1...exf1Q
- 2.Re5#
- 2.Qd7#
- 1...exf1S
- 2.Re5#
- 2.Qd7#
- 1...exf1B
- 2.Re5#
- 2.Qd7#
- 1...exf1R
- 2.Re5#
- 2.Qd7#
- 1...Re8
- 2.Bxg6#
- 1...d4!
- threat
- 1.Qa6?
- threat
- 2.Qd3#
- 2.Qe6#
- 1...Ke4
- 2.Qd3#
- 2.Qe6#
- 1...exf1Q
- 2.Re5#
- 2.Qe6#
- 2.Qf6#
- 1...exf1B
- 2.Re5#
- 2.Qe6#
- 2.Qf6#
- 1...Re8
- 2.Bxg6#
- 2.Qxg6#
- 1...Bc6
- 2.Qd3#
- 1...Bc8
- 2.Qd3#
- 1...Sf2
- 2.Sg3#
- 2.Qe6#
- 1...Sg3
- 2.Sxg3#
- 2.Qe6#
- 1...d4
- 2.Qe6#
- 1...Bxa6!
- threat
- 1.Kb1?
- Keys
- 1.Kb2!
- threat
- 2.Qb1#
- 1...Ke4
- 2.Qb1#
- 1...exf1Q
- 2.Re5#
- 1...exf1B
- 2.Re5#
- 1...Re8
- 2.Bxg6#
- 1...Ba6
- 2.Qxd5#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...d4
- 2.Qe6#
- threat
- 1.Kb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- R(h);N_GUARD::B(K),XP(f)
- B(g);N_GUARD::QAR2(C),XP(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- P(b);OGATE,XS(B)::R1(A)
- P(d);OGATE::QAB1(C)
- Tries
- Try
- K(D);S_FLIGHT
- Threat
- QAB(C)
- Vars
- K(e);N_SPINP(f),P_SPINP(b),S_FLIGHT::QAB(C)
- P(b);OGATE,XS(B)::R1(A)
- R(h);N_GUARD::B(K),XP(f)
- B(g);N_GUARD::QAR2(C),XP(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- P(d);OGATE::QAB1(C)
- Refutation
- P(b);P_PINR(A),XS(B)
- Try
- K(D);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- P(b);OGATE,XS(B)::R1(A)
- R(h);N_GUARD::B(K),XP(f)
- B(g);N_GUARD::QAR2(C),XP(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- P(d);OGATE::QAB1(C)
- Refutation
- P(b);P_PINR(A),XS(B)
- Try
- K(D);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- P(b);OGATE,XS(B)::R1(A)
- R(h);N_GUARD::B(K),XP(f)
- B(g);N_GUARD::QAR2(C),XP(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- P(d);OGATE::QAB1(C)
- Refutation
- P(b);CHECK,XS(B)
- Try
- R(A);XP(b)
- Threat
- R1(A)
- Vars
- R(h);N_GUARD::B(K),XP(f)
- Refutation
- P(c);XR(A)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- P(b);OGATE,XS(B)::R1(A)
- P(d);OGATE::QAB1(C)
- R(h);N_GUARD::B(K),XP(f)
- Refutation
- P(d);XQ(C)
- Try
- Q(C);
- Threat
- S(B)
- Vars
- R(h);N_GUARD::B(K),XP(f)
- Refutation
- P(d);
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- B(g);::QAB(C)
- P(d);::QAB1(C)
- Refutation
- B(g);XQ(C)
- Try
- Actual
- K(D);P-FLIGHT
- Threat
- QAB(C)
- Vars
- K(e);N_SPINP(f),P_SPINP(b),S_FLIGHT::QAB(C)
- P(b);OGATE,XS(B)::R1(A)
- R(h);N_GUARD::B(K),XP(f)
- B(g);N_GUARD::QAR2(C),XP(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- P(d);OGATE::QAB1(C)
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).