MESON Chess Problem Database
Problem Display
PID: 277564 (4K3/1Qb1B2N/N3k1n1/2rR1b1R/4r3/3n1Bq1/8/8 w - - 0 1)
Bonhomme, P
diagrammes, 1980
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sg5#
- 1...Qf2
- 2.Sg5#
- 1...Qh2
- 2.Sg5#
- 1...Qe5
- 2.Sg5#
- 1...Qd6
- 2.Sg5#
- 1...Qxf3
- 2.Sg5#
- 1...Qh3
- 2.Sg5#
- 1...Qg5
- 2.Sxg5#
- 1...Re1
- 2.Qc8#
- 1...Re2
- 2.Qc8#
- 1...Re3
- 2.Qc8#
- 1...Ra4
- 2.Qc8#
- 1...Rb4
- 2.Qc8#
- 1...Rec4
- 2.Qc8#
- 1...Rd4
- 2.Qc8#
- 1...Rf4
- 2.Qc8#
- 1...Rg4
- 2.Qc8#
- 1...Rh4
- 2.Qc8#
- 1...Re5
- 2.Qc8#
- 1...Bh3
- 2.Qc8#
- 1...Bg4
- 2.Sg5#
- 2.Qc8#
- 1...Bf4
- 2.Qd7#
- 1...Ba5
- 2.Qd7#
- 1...Be5
- 2.Qd7#
- 1...Bb6
- 2.Qd7#
- 1...Bb8
- 2.Qd7#
- 1...Bd8
- 2.Qd7#
- 1...Sc1
- 2.Sxc5#
- 1...Se1
- 2.Sxc5#
- 1...Sb2
- 2.Sxc5#
- 1...Sf2
- 2.Sxc5#
- 1...Sb4
- 2.Sxc5#
- 1...Sdf4
- 2.Sxc5#
- 1...Sde5
- 2.Sxc5#
- 1...Sgf4
- 2.Sf8#
- 1...Sh4
- 2.Sf8#
- 1...Sge5
- 2.Sf8#
- 1...Sf8
- 2.Sxf8#
- 1...Sh8
- 2.Sf8#
- 1...Qe1
- Tries
- 1.Sxc7+?
- 1...Qxc7
- 2.Sg5#
- 1...Rxc7!
- 1...Qxc7
- 1.Bxe4?
- threat
- 2.Bxf5#
- 2.Qc8#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxe4
- 2.Qc8#
- 1...Qf2
- 2.Sg5#
- 2.Qc8#
- 1...Qf4
- 2.Qc8#
- 1...Qe5
- 2.Sg5#
- 2.Qc8#
- 1...Qd6
- 2.Sg5#
- 2.Bxf5#
- 1...Qf3
- 2.Sg5#
- 2.Qc8#
- 1...Qh3
- 2.Sg5#
- 2.Qc8#
- 1...Qg4
- 2.Qc8#
- 1...Qg5
- 2.Sxg5#
- 2.Qc8#
- 1...Rc6
- 2.Qc8#
- 1...Bh3
- 2.Qc8#
- 1...Bg4
- 2.Sg5#
- 2.Qc8#
- 1...Bf4
- 2.Bxf5#
- 2.Qd7#
- 1...Ba5
- 2.Bxf5#
- 2.Qd7#
- 1...Be5
- 2.Bxf5#
- 2.Qd7#
- 1...Bb6
- 2.Bxf5#
- 2.Qd7#
- 1...Bd6
- 2.Bxf5#
- 2.Qd7#
- 1...Bb8
- 2.Bxf5#
- 2.Qd7#
- 1...Bd8
- 2.Bxf5#
- 2.Qd7#
- 1...Sde5
- 2.Sxc5#
- 2.Bxf5#
- 1...Sh4
- 2.Sf8#
- 2.Qc8#
- 1...Sge5
- 2.Sf8#
- 2.Bxf5#
- 1...Sf8
- 2.Sxf8#
- 2.Bxf5#
- 1...Sxe7!
- threat
- 1.Rhxf5?
- threat
- 2.Rf6#
- 2.Qc8#
- 1...Qxf3
- 2.Sg5#
- 2.Qc8#
- 1...Rxd5
- 2.Qxd5#
- 1...Sxe7
- 2.Sf8#
- 2.Rf6#
- 1...Be5
- 2.Qd7#
- 1...Sde5
- 2.Rf6#
- 1...Sge5
- 2.Rf6#
- 1...Qf4
- 2.Qc8#
- 1...Qh4
- 2.Qc8#
- 1...Qd6
- 2.Sg5#
- 2.Rf6#
- 1...Qg5
- 2.Sxg5#
- 2.Qc8#
- 1...Rf4
- 2.Qc8#
- 1...Rc6
- 2.Qc8#
- 1...Bf4
- 2.Rf6#
- 2.Qd7#
- 1...Ba5
- 2.Rf6#
- 2.Qd7#
- 1...Bb6
- 2.Rf6#
- 2.Qd7#
- 1...Bd6
- 2.Rf6#
- 2.Qd7#
- 1...Bb8
- 2.Rf6#
- 2.Qd7#
- 1...Bd8
- 2.Rf6#
- 2.Qd7#
- 1...Sf8
- 2.Sxf8#
- 2.Rf6#
- 1...Qe5!
- threat
- 1.Qc6+?
- 1...Qd6
- 2.Sxc7#
- 2.Sg5#
- 1...Bd6
- 2.Sc7#
- 1...Rxc6!
- 1...Qd6
- 1.Sxc7+?
- Keys
- 1.Re5+!
- 1...Kxe5
- 2.Qxe4#
- 1...Qxe5
- 2.Sg5#
- 1...Rexe5
- 2.Qc8#
- 1...Rcxe5
- 2.Sxc7#
- 1...Bxe5
- 2.Qd7#
- 1...Sdxe5
- 2.Sxc5#
- 1...Sgxe5
- 2.Sf8#
- 1...Kxe5
- 1.Re5+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 33
- Sets
- Q(b);N_GUARD::S(G)
- Q(b);N_GUARD,XB(A)::S(G)
- Q(b);N_GUARD::S(G),XQ(b)
- R(c);::QAB(E)
- B(e);::QAB(E)
- B(h);OGATE::QAB1(E)
- S(a);N_GUARD::S(D),XR(d)
- S(g);N_GUARD::S(G)
- S(g);N_GUARD::S(G),XS(g)
- Tries
- Try
- S(D);CHECK,XB(h)
- Vars
- Q(b);XS(D)::S(G)
- Refutation
- R(d);XS(D)
- Try
- B(A);XR(c)
- Threat
- DUALS(2)
- Vars
- R(d);OGATE,XR(B)::QAB1(E),XR(d)
- B(e);XB(A)::QAB(E)
- Q(b);::QAB(E)
- R(d);::QAB(E)
- B(e);::QAB(E)
- Refutation
- S(g);XB(F)
- Try
- R(C);XB(e)
- Threat
- DUALS(2)
- Vars
- R(d);OGATE,XR(B)::QAB1(E),XR(d)
- B(h);OGATE::QAB1(E)
- S(a);::R1(C)
- S(g);::R1(C)
- Q(b);::QAB(E)
- R(c);::QAB(E)
- R(d);::QAB(E)
- Refutation
- Q(b);
- Try
- Q(E);CHECK
- Vars
- B(h);P_SPINB(h)::S(D)
- Refutation
- R(d);XQ(E)
- Try
- Actual
- R(B);CHECK
- Vars
- K(f);P-FLIGHT,P_SPINB(e),S_CUTB(h),S_CUTQ(b),S_CUTR(d),S_CUTS(a),S_CUTS(g),XR(B)::QAR1(E),XR(c)
- Q(b);SBLOCK,XR(B)::S(G)
- R(c);SBLOCK,XR(B)::QAB(E)
- R(d);SBLOCK,XR(B)::S(D),XB(h)
- B(h);OGATE,SBLOCK,XR(B)::QAB1(E)
- S(a);SBLOCK,XR(B)::S(D),XR(d)
- S(g);SBLOCK,XR(B)::S(G)
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).