MESON Chess Problem Database
Problem Display
PID: 3090 (7b/5p1B/2NR2p1/2n2k1N/3p2R1/K2p1P1P/4n3/1Q6 w - - 0 1)
Gevers, Raymond
Source?, 1918
#2
9 + 8
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Rxf6#
- 1...Bg7
- 2.Sxg7#
- 1...Sc1
- 2.Sg3#
- 1...Sg1
- 2.Sg3#
- 1...Sc3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf4
- 2.Sg3#
- 1...Sb3
- 2.Qxd3#
- 1...Sa4
- 2.Qxd3#
- 1...Se4
- 2.fxe4#
- 1...Sa6
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Sd7
- 2.Qxd3#
- 1...f6
- 2.Bxg6#
- 1...Be5
- Tries
- 1.Kb2?
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Rxf6#
- 1...Bg7
- 2.Sxg7#
- 1...Sc1
- 2.Sg3#
- 1...Sg1
- 2.Sg3#
- 1...Sc3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf4
- 2.Sg3#
- 1...Sb3
- 2.Qxd3#
- 1...Se4
- 2.fxe4#
- 1...Sa6
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Sd7
- 2.Qxd3#
- 1...f6
- 2.Bxg6#
- 1...Sa4+!
- 1...Be5
- 1.Kb4?
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Rxf6#
- 1...Bg7
- 2.Sxg7#
- 1...Sc1
- 2.Sg3#
- 1...Sg1
- 2.Sg3#
- 1...Sc3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf4
- 2.Sg3#
- 1...Sb3
- 2.Qxd3#
- 1...Sa4
- 2.Qxd3#
- 1...Se4
- 2.fxe4#
- 1...Se6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Sd7
- 2.Qxd3#
- 1...f6
- 2.Bxg6#
- 1...Sa6+!
- 1...Be5
- 1.Rgxg6?
- threat
- 2.Rg1#
- 2.Rg2#
- 2.Rg3#
- 2.Rg4#
- 2.Rg7#
- 2.Rg8#
- 1...Bg7
- 2.Rg1#
- 2.Rg2#
- 2.Rg3#
- 2.Rg4#
- 2.Rxg7#
- 1...Sg1
- 2.Rxg1#
- 2.Rg2#
- 2.Rg3#
- 2.Rg4#
- 2.Rg7#
- 2.Rg8#
- 1...Sg3
- 2.Rxg3#
- 2.Rg4#
- 2.Rg7#
- 2.Rg8#
- 1...Sf4
- 2.Sg3#
- 1...fxg6!
- threat
- 1.Rd5+?
- 1...Be5
- 2.Rxe5#
- 1...Ke6!
- 1...Be5
- 1.Rdxg6?
- threat
- 2.R4g5#
- 2.Rd6#
- 2.Rf6#
- 2.Rh6#
- 1...Bf6
- 2.Rxf6#
- 1...f6
- 2.Rxf6#
- 1...Sf4
- 2.Sg3#
- 2.Rxf4#
- 2.R4g5#
- 2.Rf6#
- 1...Se4
- 2.Rd6#
- 2.Rf6#
- 2.Rh6#
- 2.fxe4#
- 1...Se6
- 2.R6g5#
- 2.Rf6#
- 2.Rh6#
- 2.Rg7#
- 2.Rg8#
- 2.Qxd3#
- 1...fxg6!
- threat
- 1.Qc2?
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Rxf6#
- 1...Bg7
- 2.Sxg7#
- 1...Sc1
- 2.Sg3#
- 1...Sg1
- 2.Sg3#
- 1...Sc3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf4
- 2.Sg3#
- 1...Sb3
- 2.Qxd3#
- 1...Sa4
- 2.Qxd3#
- 1...Se4
- 2.fxe4#
- 1...Sa6
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Sd7
- 2.Qxd3#
- 1...f6
- 2.Bxg6#
- 2.Qxc5#
- 1...dxc2!
- 1...Be5
- 1.Qxd3+?
- 1...Se4
- 2.Qxe4#
- 2.fxe4#
- 1...Sxd3!
- 1...Se4
- 1.Qd1?
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Rxf6#
- 1...Bg7
- 2.Sxg7#
- 1...Sc1
- 2.Sg3#
- 1...Sg1
- 2.Sg3#
- 1...Sc3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf4
- 2.Sg3#
- 1...Sb3
- 2.Qxd3#
- 1...Sa4
- 2.Qxd3#
- 1...Se4
- 2.fxe4#
- 1...Sa6
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Sd7
- 2.Qxd3#
- 1...f6
- 2.Bxg6#
- 1...d2!
- 1...Be5
- 1.Qg1?
- threat
- 2.Rg5#
- 1...Sxg1
- 2.Sg3#
- 1...Bf6
- 2.Rxf6#
- 1...Sg3
- 2.Sxg3#
- 1...Se4
- 2.fxe4#
- 1...f6
- 2.Bxg6#
- 1...Se6!
- threat
- 1.Qb5?
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Rxf6#
- 1...Bg7
- 2.Sxg7#
- 1...Sc1
- 2.Sg3#
- 1...Sg1
- 2.Sg3#
- 1...Sc3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf4
- 2.Sg3#
- 1...f6
- 2.Bxg6#
- 2.Qxc5#
- 1...d2!
- 1...Be5
- 1.h4?
- threat
- 2.Rg5#
- 1...Bf6
- 2.Rxf6#
- 1...Se6
- 2.Qxd3#
- 1...f6
- 2.Bxg6#
- 1...Se4!
- threat
- 1.Kb2?
- Keys
- 1.Bg8!
- 1...gxh5
- 2.Bh7#
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Rxf6#
- 1...Bg7
- 2.Sxg7#
- 1...Sc1
- 2.Sg3#
- 1...Sg1
- 2.Sg3#
- 1...Sc3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf4
- 2.Sg3#
- 1...Sb3
- 2.Qxd3#
- 1...Sa4
- 2.Qxd3#
- 1...Se4
- 2.fxe4#
- 1...Sa6
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Sd7
- 2.Qxd3#
- 1...g5
- 2.Bh7#
- 1...f6
- 2.Rd5#
- 1...gxh5
- 1.Bg8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(h);SBLOCK::S(G)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(d);N_GUARD::QAB(A),XP(b)
- S(d);N_SPINP(b),OGATE,P_SPINP(f)::P(C),XS(d)
- P(g);N_GUARD::B(I),XP(f)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- B(h);SBLOCK::S(G)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(d);N_GUARD::QAB(A),XP(b)
- S(d);N_SPINP(b),OGATE,P_SPINP(f)::P(C),XS(d)
- P(g);N_GUARD::B(I),XP(f)
- Refutation
- S(d);CHECK
- Try
- K(B);S_FLIGHT
- Vars
- B(h);SBLOCK::S(G)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(d);N_GUARD::QAB(A),XP(b)
- S(d);N_SPINP(b),OGATE,P_SPINP(f)::P(C),XS(d)
- P(g);N_GUARD::B(I),XP(f)
- Refutation
- S(d);CHECK
- Try
- R(E);XP(f)
- Threat
- DUALS(6)
- Vars
- S(a);N_GUARD,SBLOCK::S(F)
- Refutation
- P(g);XR(E)
- Try
- R(H);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::R1(H),XB(h)
- Refutation
- K(e);N_SPINP(b),S_FLIGHT
- Try
- R(H);XP(f)
- Threat
- DUALS(4)
- Vars
- B(h);::B(I)+R(H),DCHECK,XB(h)
- P(g);::B(I)+R(H),DCHECK,XP(g)
- Refutation
- P(g);XR(H)
- Try
- Q(A);
- Vars
- B(h);SBLOCK::S(G)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(d);N_GUARD::QAB(A),XP(b)
- S(d);N_SPINP(b),OGATE,P_SPINP(f)::P(C),XS(d)
- Refutation
- P(b);N_SPINP(b),P_SPINP(f),XQ(A)
- Try
- Q(A);CHECK,P_PINP(f),XP(b)
- Refutation
- S(d);XQ(A)
- Try
- Q(A);N_PINP(b),P_PINP(f)
- Vars
- B(h);SBLOCK::S(G)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(d);N_GUARD::QAB(A),XP(b)
- S(d);OGATE::P(C),XS(d)
- P(g);N_GUARD::B(I),XP(f)
- Refutation
- P(b);
- Try
- Q(A);N_PINP(b),P_PINP(f)
- Threat
- R1(E)
- Vars
- S(a);N_GUARD,XQ(A)::S(F)
- B(h);N_GUARD::R1(H),XB(h)
- S(a);N_GUARD::S(F),XS(a)
- S(d);OGATE::P(C),XS(d)
- P(g);N_GUARD::B(I),XP(f)
- Refutation
- S(d);
- Try
- Q(A);N_PINP(b),P_PINP(f),P_PINS(d)
- Vars
- B(h);N_SPINS(d),SBLOCK::S(G)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- Refutation
- P(b);
- Try
- P(D);
- Threat
- R1(E)
- Vars
- B(h);N_GUARD::R1(H),XB(h)
- S(d);N_GUARD::QAB(A),XP(b)
- P(g);N_GUARD::B(I),XP(f)
- Refutation
- S(d);N_SPINP(b),P_SPINP(f)
- Try
- Actual
- B(I);
- Vars
- P(f);OGATEB,XS(F)::B(I)
- B(h);SBLOCK::S(G)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(d);N_GUARD::QAB(A),XP(b)
- S(d);N_SPINP(b),OGATE::P(C),XS(d)
- P(f);OGATEB::B(I)
- P(g);S_CUTB(h)::R(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).