MESON Chess Problem Database
Problem Display
PID: 49076 (4K3/3pR3/3p4/3PnQp1/5bN1/4Pk2/4p1b1/4B1R1 w - - 0 1)
Gruber, Bratoljub
1/2 Prize, Shakhmaty v SSSR-40 JT, 1965-1966
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Rg3#
- 1...Bh1
- 2.Rg3#
- 1...Bh3
- 2.Rg3#
- 1...Sd3
- 2.Sh2#
- 1...Sc4
- 2.Sh2#
- 1...Sxg4
- 2.Qe4#
- 1...Sc6
- 2.Sh2#
- 1...Sg6
- 2.Sh2#
- 1...Sf7
- 2.Sh2#
- 1...Bf1
- Tries
- 1.Kf8?
- 1...Sxg4
- 2.Qe4#
- 1...Bf1
- 2.Rg3#
- 1...Bh1
- 2.Rg3#
- 1...Bh3
- 2.Rg3#
- 1...Sd3
- 2.Sh2#
- 1...Sc4
- 2.Sh2#
- 1...Sc6
- 2.Sh2#
- 1...Sf7
- 2.Sh2#
- 1...Sg6+!
- 1...Sxg4
- 1.Sxe5+?
- 1...Kxe3
- 2.Qd3#
- 1...dxe5!
- 1...Kxe3
- 1.Sh6?
- 1...Bf1
- 2.Rg3#
- 1...Bh1
- 2.Rg3#
- 1...Bh3
- 2.Rg3#
- 1...Sd3
- 2.Qe4#
- 2.Qg4#
- 1...Sc4
- 2.Qe4#
- 2.Qg4#
- 1...Sg4
- 2.Qe4#
- 2.Qxg4#
- 1...Sc6
- 2.Qe4#
- 2.Qg4#
- 1...Sg6
- 2.Qe4#
- 2.Qg4#
- 1...Sf7
- 2.Qe4#
- 2.Qg4#
- 1...g4
- 2.Qxf4#
- 1...Kxe3!
- 1...Bf1
- 1.Re6?
- 1...Sxg4
- 2.Qe4#
- 1...Bf1
- 2.Rg3#
- 1...Bh1
- 2.Rg3#
- 1...Bh3
- 2.Rg3#
- 1...Sd3
- 2.Sh2#
- 1...Sc4
- 2.Sh2#
- 1...Sc6
- 2.Sh2#
- 1...Sg6
- 2.Sh2#
- 1...Sf7
- 2.Sh2#
- 1...dxe6!
- 1...Sxg4
- 1.exf4?
- threat
- 2.fxe5#
- 2.fxg5#
- 1...Sxg4
- 2.Qe4#
- 2.fxg5#
- 1...Sd3
- 2.Sh2#
- 2.Re3#
- 1...Sc4
- 2.Sh2#
- 2.fxg5#
- 1...Sc6
- 2.Sh2#
- 2.Re3#
- 2.fxg5#
- 1...Sg6
- 2.Sh2#
- 2.Re3#
- 1...Sf7
- 2.Sh2#
- 2.Re3#
- 2.fxg5#
- 1...gxf4!
- threat
- 1.Kf8?
- Keys
- 1.Sf2!
- 1...Kxe3
- 2.Qd3#
- 1...Kg3
- 2.Qh3#
- 1...Bf1
- 2.Qe4#
- 1...Bh1
- 2.Qe4#
- 1...Bh3
- 2.Qe4#
- 1...Sd3
- 2.Qg4#
- 1...Sc4
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Sc6
- 2.Qg4#
- 1...Sg6
- 2.Qg4#
- 1...Sf7
- 2.Qg4#
- 1...g4
- 2.Qxf4#
- 1...Kxe3
- 1.Sf2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- B(b);OGATE::R1(B)
- S(e);::S(D)
- S(e);SBLOCK,XS(D)::QAB1(F)
- Tries
- Try
- K(H);P-FLIGHT
- Vars
- S(e);SBLOCK,XS(D)::QAB1(F)
- B(b);OGATE::R1(B)
- S(e);::S(D)
- Refutation
- S(e);CHECK
- Try
- S(D);CHECK,XS(e)
- Vars
- K(c);N_SPINB(d),P-FLIGHT,XP(C)::QAR1(F)
- Refutation
- P(g);XS(D)
- Try
- S(D);
- Vars
- B(b);OGATE::R1(B)
- P(f);N_GUARD::QAR1(F),XB(d)
- Refutation
- K(c);N_SPINB(d),P-FLIGHT,P_SPINS(e),XP(C)
- Try
- R(G);
- Vars
- S(e);SBLOCK,XS(D)::QAB1(F)
- B(b);OGATE::R1(B)
- S(e);::S(D)
- Refutation
- P(h);XR(G)
- Try
- P(C);XB(d)
- Threat
- DUALS(2)
- Refutation
- P(f);P_SPINP(f),XP(C)
- Try
- Actual
- S(D);
- Vars
- K(c);N_SPINB(d),OGATEB,P-FLIGHT,P_SPINS(e),XP(C)::QAR1(F)
- K(c);N_SPINB(d),P-FLIGHT,P_SPINB(b)::QAR1(F)
- B(b);::QAB1(F)
- S(e);N_GUARD::QAB1(F)
- S(e);N_GUARD::QAB1(F),XS(e)
- P(f);N_GUARD::QAR1(F),XB(d)
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).