MESON Chess Problem Database
Problem Display
PID: 155627 (6B1/K6p/NQ6/p2Np1b1/4k1r1/1n2P3/4PR2/B2n4 w - - 0 1)
Robert, Philippe
The Problemist Supplement, 2015
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Bxe3
- 2.Sf6#
- 1...Bf6
- 2.Sxf6#
- 1...Bh6
- 2.Sf6#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sxe3
- 2.Sc3#
- 1...Sxa1
- 2.Sc5#
- 1...Sc1
- 2.Sc5#
- 1...Sd2
- 2.Sc5#
- 1...Sd4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...h5
- 2.Qg6#
- 1...h6
- 2.Qg6#
- 1...Bxe3
- Tries
- 1.Qd4+?
- 1...Sxd4
- 2.Sc5#
- 1...exd4!
- 1...Sxd4
- 1.Qc5?
- threat
- 2.Bxh7#
- 2.Qc2#
- 1...Bxe3
- 2.Sf6#
- 1...Sxf2
- 2.Bxh7#
- 1...Sxe3
- 2.Sc3#
- 1...Sxa1
- 2.Bxh7#
- 2.Qc4#
- 1...Sxc5
- 2.Sxc5#
- 1...Rf4
- 2.Qc2#
- 1...Bf4
- 2.Qc2#
- 1...Rh4
- 2.Qc2#
- 1...Bh4
- 2.Qc2#
- 1...Bf6
- 2.Sxf6#
- 2.Qc2#
- 1...Bh6
- 2.Sf6#
- 2.Qc2#
- 1...Be7
- 2.Qc2#
- 1...Bd8
- 2.Qc2#
- 1...Sb2
- 2.Sc3#
- 2.Bxh7#
- 1...Sc3
- 2.Sxc3#
- 2.Bxh7#
- 1...Sc1
- 2.Bxh7#
- 2.Qc4#
- 1...h5
- 2.Bh7#
- 2.Qc2#
- 1...h6
- 2.Bh7#
- 2.Qc2#
- 1...Sd4!
- threat
- 1.Qc7?
- threat
- 2.Qxe5#
- 2.Qc2#
- 2.Qxh7#
- 1...Sxf2
- 2.Qxe5#
- 2.Qxh7#
- 1...Sxe3
- 2.Qxe5#
- 1...Sxa1
- 2.Sc5#
- 2.Qc4#
- 2.Qxh7#
- 1...Rf4
- 2.Qxe5#
- 2.Qc2#
- 1...Bf4
- 2.Qc2#
- 1...Rh4
- 2.Qxe5#
- 2.Qc2#
- 1...Bh4
- 2.Qxe5#
- 2.Qc2#
- 1...Bf6
- 2.Qc2#
- 1...Bh6
- 2.Qxe5#
- 2.Qc2#
- 1...Be7
- 2.Qxe5#
- 2.Qc2#
- 1...Bd8
- 2.Qxe5#
- 2.Qc2#
- 1...Sb2
- 2.Qxh7#
- 1...Sc3
- 2.Qxh7#
- 1...Sc1
- 2.Sc5#
- 2.Qxe5#
- 2.Qc4#
- 2.Qxh7#
- 1...Sd4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 2.Qxe5#
- 2.Qxh7#
- 1...h5
- 2.Qxe5#
- 2.Qc2#
- 2.Qh7#
- 1...h6
- 2.Qxe5#
- 2.Qc2#
- 2.Qh7#
- 1...Bxe3+!
- threat
- 1.Qxb3?
- threat
- 2.Sc5#
- 2.Bxh7#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Sxf2
- 2.Bxh7#
- 1...Sxe3
- 2.Sc5#
- 2.Qd3#
- 1...Rf4
- 2.Qc2#
- 2.Qb1#
- 2.Qd3#
- 1...Bf4
- 2.Qc2#
- 2.Qb1#
- 2.Qd3#
- 1...Rh4
- 2.Sc5#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Bh4
- 2.Sc5#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Bf6
- 2.Sxf6#
- 2.Sc5#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Bh6
- 2.Sf6#
- 2.Sc5#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Be7
- 2.Qc2#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Bd8
- 2.Sc5#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Sb2
- 2.Sc5#
- 2.Bxh7#
- 1...Sc3
- 2.Sc5#
- 2.Bxh7#
- 2.Qc2#
- 2.Qc4#
- 1...a4
- 2.Sc5#
- 2.Bxh7#
- 2.Qc2#
- 2.Qxa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 2.Qb4#
- 1...h5
- 2.Sc5#
- 2.Bh7#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...h6
- 2.Sc5#
- 2.Bh7#
- 2.Qc2#
- 2.Qa4#
- 2.Qc4#
- 2.Qb1#
- 2.Qd3#
- 1...Bxe3+!
- threat
- 1.Qb4+?
- 1...Sd4
- 2.Sc5#
- 1...axb4!
- 1...Sd4
- 1.Qb5?
- threat
- 2.Bxh7#
- 2.Qd3#
- 1...Sxf2
- 2.Bxh7#
- 1...Sxe3
- 2.Qd3#
- 1...Rf4
- 2.Qd3#
- 1...Bf4
- 2.Qd3#
- 1...Rh4
- 2.Qd3#
- 1...Bh4
- 2.Qd3#
- 1...Bf6
- 2.Qd3#
- 1...Bh6
- 2.Qd3#
- 1...Be7
- 2.Qd3#
- 1...Bd8
- 2.Qd3#
- 1...Sb2
- 2.Bxh7#
- 1...Sc1
- 2.Sc5#
- 2.Bxh7#
- 2.Qa4#
- 2.Qc4#
- 1...Sd4
- 2.Sc5#
- 2.Qd3#
- 1...Sc5
- 2.Sxc5#
- 2.Qc4#
- 1...h5
- 2.Bh7#
- 2.Qd3#
- 1...h6
- 2.Bh7#
- 2.Qd3#
- 1...Bxe3+!
- threat
- 1.Qd4+?
- Keys
- 1.Qc6!
- threat
- 2.Bxh7#
- 2.Qc2#
- 1...Bxe3+
- 2.Sb6#
- 1...Sxf2
- 2.Bxh7#
- 1...Sxe3
- 2.Sf6#
- 1...Sxa1
- 2.Sc5#
- 2.Bxh7#
- 2.Qa4#
- 2.Qc4#
- 1...Rf4
- 2.Qc2#
- 1...Bf4
- 2.Qc2#
- 1...Rh4
- 2.Qc2#
- 1...Bh4
- 2.Qc2#
- 1...Bf6
- 2.Qc2#
- 1...Bh6
- 2.Qc2#
- 1...Be7
- 2.Qc2#
- 1...Bd8
- 2.Qc2#
- 1...Sb2
- 2.Bxh7#
- 1...Sc3
- 2.Bxh7#
- 1...Sc1
- 2.Sc5#
- 2.Bxh7#
- 2.Qa4#
- 2.Qc4#
- 1...Sd4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 2.Bxh7#
- 1...h5
- 2.Bh7#
- 2.Qc2#
- 2.Qg6#
- 1...h6
- 2.Bh7#
- 2.Qc2#
- 2.Qg6#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 6
- ADDED MATES = 7
- REMOVED MATES = 6
- Sets
- B(g);N_GUARD,P_PINQ(G),XP(D)::S(E)
- B(g);N_GUARD::S(E),XB(g)
- B(g);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(a);N_GUARD,XP(D)::S(E)
- S(b);N_GUARD,XB(A)::S(F)
- S(b);N_GUARD::S(F)
- S(b);N_GUARD::S(F),XS(b)
- P(h);N_GUARD::QAB(G)
- Tries
- Try
- Q(G);CHECK
- Vars
- S(b);XQ(G)::S(F)
- Refutation
- P(f);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(g);N_GUARD,P_PINQ(G),XP(D)::S(E)
- S(a);XR(C)::B(I),XP(h)
- S(a);N_GUARD,XP(D)::S(E)
- S(b);XQ(G)::S(F),XS(b)
- R(d);::QAB(G)
- B(g);::QAB(G)
- Refutation
- S(b);
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- S(a);XP(D)::QAR1(G),XP(f)
- B(g);::QAB(G)
- S(a);::QAB(G),XP(h)
- S(b);N_GUARD::S(F)
- Refutation
- B(g);CHECK,XP(D)
- Try
- Q(G);XS(b)
- Threat
- DUALS(7)
- Vars
- S(a);XR(C)::B(I),XP(h)
- Refutation
- B(g);CHECK,XP(D)
- Try
- Q(G);CHECK
- Vars
- S(b);P_SPINS(b)::S(F)
- Refutation
- P(e);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- S(a);XR(C)::B(I),XP(h)
- S(a);XP(D)::QAB1(G)
- R(d);::QAB1(G)
- B(g);::QAB1(G)
- S(a);::B(I),XP(h)
- Refutation
- B(g);CHECK,XP(D)
- Try
- Actual
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,SBLOCK,XP(D)::QAB(G)+S(E)
- S(a);XR(C)::B(I),XP(h)
- S(a);SBLOCK,XP(D)::QAB(G)+S(E),DCHECK
- R(d);::QAB(G)
- B(g);::QAB(G)
- S(a);::B(I),XP(h)
- S(b);N_GUARD::S(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).