MESON Chess Problem Database
Problem Display
PID: 109516 (8/3p4/3Rp3/2Knn2B/Q2p4/2PkPP1p/p2B3R/rb6 w - - 0 1)
Theriault, Stephane
Matou, 1991
#2
9 + 10
| 3713 | Snap | 2009 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bc2
- 2.Qxd4#
- 1...Sxc3
- 2.Rxd4#
- 1...Sxe3
- 2.Rxd4#
- 1...Sb4
- 2.Rxd4#
- 1...Sf4
- 2.Rxd4#
- 1...Sb6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sxf3
- 2.Bg6#
- 1...Sc4
- 2.Bg6#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sf7
- 2.Bg6#
- 1...dxc3
- 2.Qe4#
- 1...dxe3
- 2.Qe4#
- 1...Bc2
- Tries
- 1.Bf7?
- 1...Sxc3
- 2.Rxd4#
- 1...Sxe3
- 2.Rxd4#
- 1...Sxf3
- 2.Bg6#
- 1...dxc3
- 2.Qe4#
- 1...dxe3
- 2.Qe4#
- 1...Sb4
- 2.Rxd4#
- 1...Bc2
- 2.Qxd4#
- 1...Sf4
- 2.Rxd4#
- 1...Sb6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sc4
- 2.Bg6#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sxf7!
- 1...Sxc3
- 1.Be8?
- 1...Sxc3
- 2.Rxd4#
- 1...Sxe3
- 2.Rxd4#
- 1...Sxf3
- 2.Bg6#
- 1...dxc3
- 2.Qe4#
- 1...dxe3
- 2.Qe4#
- 1...Sb4
- 2.Rxd4#
- 1...Bc2
- 2.Qxd4#
- 1...Sf4
- 2.Rxd4#
- 1...Sb6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sc4
- 2.Bg6#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sf7!
- 1...Sxc3
- 1.Rf2?
- 1...Sxc3
- 2.Rxd4#
- 1...Sxe3
- 2.Rxd4#
- 1...Sxf3
- 2.Bg6#
- 1...dxc3
- 2.Qe4#
- 1...dxe3
- 2.Qe4#
- 1...Sb4
- 2.Rxd4#
- 1...Bc2
- 2.Qxd4#
- 1...Sf4
- 2.Rxd4#
- 1...Sb6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sc4
- 2.Bg6#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sf7
- 2.Bg6#
- 1...h2!
- 1...Sxc3
- 1.Rxd7?
- 1...Sxc3
- 2.Rxd4#
- 1...Sxe3
- 2.Rxd4#
- 1...Sxf3
- 2.Bg6#
- 1...dxc3
- 2.Qe4#
- 1...dxe3
- 2.Qe4#
- 1...Sb4
- 2.Rxd4#
- 1...Bc2
- 2.Qxd4#
- 1...Sf4
- 2.Rxd4#
- 1...Sb6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sc4
- 2.Bg6#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sf7
- 2.Bg6#
- 1...Sxd7+!
- 1...Sxc3
- 1.Qb3?
- 1...Sxc3
- 2.Rxd4#
- 2.Qxc3#
- 1...Sxe3
- 2.Rxd4#
- 2.cxd4#
- 2.c4#
- 1...Sxf3
- 2.Bg6#
- 1...dxc3
- 2.Qxc3#
- 1...dxe3
- 2.c4#
- 1...Sb4
- 2.Rxd4#
- 2.cxb4#
- 2.cxd4#
- 2.c4#
- 1...Sf4
- 2.Rxd4#
- 2.cxd4#
- 2.c4#
- 1...Sb6
- 2.Rxd4#
- 2.cxd4#
- 2.c4#
- 1...Sf6
- 2.Rxd4#
- 2.cxd4#
- 2.c4#
- 1...Sc7
- 2.Rxd4#
- 2.cxd4#
- 2.c4#
- 1...Se7
- 2.Rxd4#
- 2.cxd4#
- 2.c4#
- 1...Sc4
- 2.Bg6#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sf7
- 2.Bg6#
- 1...Bc2!
- 1...Sxc3
- 1.Qb5+?
- 1...Sc4
- 2.Bg6#
- 1...Kc2!
- 1...Sc4
- 1.Qc4+?
- 1...Sxc4
- 2.Bg6#
- 1...Kc2!
- 1...Sxc4
- 1.Qa6+?
- 1...Sc4
- 2.Bg6#
- 1...Kc2!
- 1...Sc4
- 1.c4?
- 1...Sxe3
- 2.Rxd4#
- 2.Qb3#
- 1...Sxf3
- 2.Bg6#
- 1...Sxc4
- 2.Bg6#
- 2.Qxc4#
- 1...dxe3
- 2.Qb3#
- 1...Sb4
- 2.Rxd4#
- 2.Qb3#
- 1...Sc3
- 2.Rxd4#
- 1...Sf4
- 2.Rxd4#
- 2.Qb3#
- 1...Sb6
- 2.Rxd4#
- 2.Qb3#
- 1...Sf6
- 2.Rxd4#
- 2.Qb3#
- 1...Sc7
- 2.Rxd4#
- 2.Qb3#
- 1...Se7
- 2.Rxd4#
- 2.Qb3#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sf7
- 2.Bg6#
- 1...Bc2!
- 1...Sxe3
- 1.Bf7?
- Keys
- 1.Qd1!
- 1...Sxc3
- 2.Rxd4#
- 1...Sxe3
- 2.Rxd4#
- 1...Sxf3
- 2.Bg6#
- 1...dxc3
- 2.Bc1#
- 1...dxe3
- 2.Be1#
- 1...Sb4
- 2.Rxd4#
- 1...Bc2
- 2.Qe2#
- 1...Sf4
- 2.Rxd4#
- 1...Sb6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sc4
- 2.Bg6#
- 1...Sg4
- 2.Bg6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sf7
- 2.Bg6#
- 1...Sxc3
- 1.Qd1!
Anticipated by 110736(1962)
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(b);SBLOCK::QAR1(F),XP(f)
- S(g);OGATE,P_SPINP(f),XP(C)::R1(I),XP(f)
- S(g);OGATE,P_SPINP(f),XP(D)::R1(I),XP(f)
- S(g);OGATE,P_SPINP(f)::R1(I),XP(f)
- S(h);N_GUARD,XP(E)::B(H)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
- P(f);OGATE,P_SPINS(g),XP(C)::QAB1(F)
- P(f);OGATE,P_SPINS(g),XP(D)::QAB1(F)
- Tries
- Try
- B(H);
- Vars
- S(g);OGATE,P_SPINP(f),XP(C)::R1(I),XP(f)
- S(g);OGATE,P_SPINP(f),XP(D)::R1(I),XP(f)
- S(h);N_GUARD,XP(E)::B(H)
- P(f);OGATE,P_SPINS(g),XP(C)::QAB1(F)
- P(f);OGATE,P_SPINS(g),XP(D)::QAB1(F)
- S(g);OGATE,P_SPINP(f)::R1(I),XP(f)
- B(b);SBLOCK::QAR1(F),XP(f)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
- Refutation
- S(h);XB(H)
- Try
- B(H);
- Vars
- S(g);OGATE,P_SPINP(f),XP(C)::R1(I),XP(f)
- S(g);OGATE,P_SPINP(f),XP(D)::R1(I),XP(f)
- S(h);N_GUARD,XP(E)::B(H)
- P(f);OGATE,P_SPINS(g),XP(C)::QAB1(F)
- P(f);OGATE,P_SPINS(g),XP(D)::QAB1(F)
- S(g);OGATE,P_SPINP(f)::R1(I),XP(f)
- B(b);SBLOCK::QAR1(F),XP(f)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
- Refutation
- S(h);
- Try
- R(B);
- Vars
- S(g);OGATE,P_SPINP(f),XP(C)::R1(I),XP(f)
- S(g);OGATE,P_SPINP(f),XP(D)::R1(I),XP(f)
- S(h);N_GUARD,XP(E)::B(H)
- P(f);OGATE,P_SPINS(g),XP(C)::QAB1(F)
- P(f);OGATE,P_SPINS(g),XP(D)::QAB1(F)
- S(g);OGATE,P_SPINP(f)::R1(I),XP(f)
- B(b);SBLOCK::QAR1(F),XP(f)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
- Refutation
- P(e);
- Try
- R(I);XP(j)
- Vars
- S(g);OGATE,P_SPINP(f),XP(C)::R1(I),XP(f)
- S(g);OGATE,P_SPINP(f),XP(D)::R1(I),XP(f)
- S(h);N_GUARD,XP(E)::B(H)
- P(f);OGATE,P_SPINS(g),XP(C)::QAB1(F)
- P(f);OGATE,P_SPINS(g),XP(D)::QAB1(F)
- S(g);OGATE,P_SPINP(f)::R1(I),XP(f)
- B(b);SBLOCK::QAR1(F),XP(f)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
- Refutation
- S(h);CHECK,XR(I)
- Try
- Q(F);
- Vars
- S(h);N_GUARD,XP(E)::B(H)
- P(f);OGATE,P_SPINP(f),P_SPINS(g),XP(C)::QAR1(F),XP(f)
- P(f);P_SPINS(g),XP(D)::QAR(F)+P(C)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
- Refutation
- B(b);
- Try
- Q(F);CHECK
- Vars
- S(h);P_SPINS(h)::B(H)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(F);CHECK
- Vars
- S(h);XQ(F)::B(H)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(F);CHECK
- Vars
- S(h);P_SPINS(h)::B(H)
- Refutation
- K(d);S_FLIGHT
- Try
- P(C);
- Vars
- S(h);N_GUARD,XP(E)::B(H)
- P(f);P_SPINS(g),XP(D)::QAR2(F)
- S(g);OGATE,P_SPINP(f)::R1(I),XP(f)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
- Refutation
- B(b);
- Try
- Actual
- Q(F);
- Vars
- S(g);OGATE,P_SPINP(f),XP(C)::R1(I),XP(f)
- S(g);OGATE,P_SPINP(f),XP(D)::R1(I),XP(f)
- S(h);N_GUARD,XP(E)::B(H)
- P(f);P_SPINS(g),SBLOCK,XP(C)::QAR(F)+B(A)
- P(f);P_SPINS(g),SBLOCK,XP(D)::QAR(F)+B(A)
- S(g);OGATE,P_SPINP(f)::R1(I),XP(f)
- B(b);SBLOCK::QAB1(F)
- S(h);N_GUARD::B(H)
- S(h);N_GUARD::B(H),XS(h)
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).