MESON Chess Problem Database
Problem Display
PID: 79368 (8/3NN1p1/1p2p3/4P1R1/3pk2r/3n4/1n2K1P1/1BQ5 w - - 0 1)
Kovacs, Florian Janos
Karlov Chess Club, 1925
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Rg4#
- 1...Rh2
- 2.Rg4#
- 1...Rh3
- 2.Rg4#
- 1...Rf4
- 2.Qc6#
- 1...Rg4
- 2.Rxg4#
- 1...Rh5
- 2.Rg4#
- 1...Rh6
- 2.Rg4#
- 1...Rh7
- 2.Rg4#
- 1...Rh8
- 2.Rg4#
- 1...Sd1
- 2.Bxd3#
- 1...Sa4
- 2.Bxd3#
- 1...Sc4
- 2.Bxd3#
- 1...b5
- 2.Sc5#
- 1...g6
- 2.Sf6#
- 1...Rh1
- Tries
- 1.Bc2?
- 1...Rh1
- 2.Rg4#
- 1...Rh2
- 2.Rg4#
- 1...Rh3
- 2.Rg4#
- 1...Rg4
- 2.Rxg4#
- 1...Rh5
- 2.Rg4#
- 1...Rh6
- 2.Rg4#
- 1...Rh7
- 2.Rg4#
- 1...Rh8
- 2.Rg4#
- 1...Sd1
- 2.Bxd3#
- 1...Sa4
- 2.Bxd3#
- 1...Sc4
- 2.Bxd3#
- 1...b5
- 2.Sc5#
- 1...g6
- 2.Sf6#
- 1...Rf4!
- 1...Rh1
- 1.Rf5?
- threat
- 2.Qc6#
- 1...Sc4
- 2.Bxd3#
- 1...exf5!
- threat
- 1.Rg6?
- 1...Rh1
- 2.Rg4#
- 1...Rh2
- 2.Rg4#
- 1...Rh3
- 2.Rg4#
- 1...Rf4
- 2.Qc6#
- 1...Rg4
- 2.Rxg4#
- 1...Rh5
- 2.Rg4#
- 1...Rh6
- 2.Rg4#
- 1...Rh7
- 2.Rg4#
- 1...Rh8
- 2.Rg4#
- 1...Sd1
- 2.Bxd3#
- 1...Sa4
- 2.Bxd3#
- 1...Sc4
- 2.Bxd3#
- 1...b5!
- 1...Rh1
- 1.Rxg7?
- 1...Rh1
- 2.Rg4#
- 1...Rh2
- 2.Rg4#
- 1...Rh3
- 2.Rg4#
- 1...Rf4
- 2.Qc6#
- 1...Rg4
- 2.Rxg4#
- 1...Rh5
- 2.Rg4#
- 1...Rh6
- 2.Rg4#
- 1...Rh7
- 2.Rg4#
- 1...Rh8
- 2.Rg4#
- 1...Sd1
- 2.Bxd3#
- 1...Sa4
- 2.Bxd3#
- 1...Sc4
- 2.Bxd3#
- 1...b5!
- 1...Rh1
- 1.Qd2?
- 1...Rh1
- 2.Rg4#
- 1...Rh2
- 2.Rg4#
- 1...Rh3
- 2.Rg4#
- 1...Rg4
- 2.Rxg4#
- 1...Rh5
- 2.Rg4#
- 1...Rh6
- 2.Rg4#
- 1...Rh7
- 2.Rg4#
- 1...Rh8
- 2.Rg4#
- 1...Sd1
- 2.Bxd3#
- 1...Sa4
- 2.Bxd3#
- 1...Sc4
- 2.Bxd3#
- 1...b5
- 2.Sc5#
- 1...g6
- 2.Sf6#
- 1...Rf4!
- 1...Rh1
- 1.Qf1?
- threat
- 2.Qf3#
- 1...Rh3
- 2.Rg4#
- 1...Rf4!
- threat
- 1.Qh1?
- threat
- 2.Qxh4#
- 1...Kf4
- 2.Qxh4#
- 1...Rxh1
- 2.Rg4#
- 1...Rh2
- 2.Rg4#
- 1...Rh3
- 2.Rg4#
- 1...Rg4
- 2.Rxg4#
- 2.g3#
- 1...Rh5
- 2.Rg4#
- 1...Rh6
- 2.Rg4#
- 1...Rh7
- 2.Rg4#
- 1...Rh8
- 2.Rg4#
- 1...Rf4!
- threat
- 1.g3?
- threat
- 2.Qc6#
- 1...Sc4
- 2.Bxd3#
- 1...Rh2+!
- threat
- 1.Bc2?
- Keys
- 1.Qe1!
- threat
- 2.Qxh4#
- 1...Kf4
- 2.Qxh4#
- 1...Rh1
- 2.Rg4#
- 1...Rh2
- 2.Rg4#
- 1...Rh3
- 2.Rg4#
- 1...Rf4
- 2.Kd2#
- 1...Rg4
- 2.Rxg4#
- 1...Rh5
- 2.Rg4#
- 1...Rh6
- 2.Rg4#
- 1...Rh7
- 2.Rg4#
- 1...Rh8
- 2.Rg4#
- threat
- 1.Qe1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- R(e);N_GUARD::R(F)
- R(e);N_GUARD,P_PINP(D)::R(F)
- R(e);SBLOCK::QAB(B)
- R(e);N_GUARD::R(F),XR(e)
- S(a);N_GUARD::B(A),XS(b)
- P(f);N_GUARD::S(G)
- P(h);N_GUARD::S(G)
- Tries
- Try
- B(A);
- Vars
- R(e);N_GUARD::R(F)
- R(e);N_GUARD,P_PINP(D)::R(F)
- R(e);N_GUARD::R(F),XR(e)
- S(a);N_GUARD::B(A),XS(b)
- P(f);N_GUARD::S(G)
- P(h);N_GUARD::S(G)
- Refutation
- R(e);
- Try
- R(F);
- Threat
- QAB(B)
- Vars
- S(a);N_GUARD::B(A),XS(b)
- Refutation
- P(g);XR(F)
- Try
- R(F);
- Vars
- R(e);N_GUARD::R(F)
- R(e);N_GUARD,P_PINP(D)::R(F)
- R(e);SBLOCK::QAB(B)
- R(e);N_GUARD::R(F),XR(e)
- S(a);N_GUARD::B(A),XS(b)
- Refutation
- P(f);
- Try
- R(F);XP(h)
- Vars
- R(e);N_GUARD::R(F)
- R(e);N_GUARD,P_PINP(D)::R(F)
- R(e);SBLOCK::QAB(B)
- R(e);N_GUARD::R(F),XR(e)
- S(a);N_GUARD::B(A),XS(b)
- Refutation
- P(f);
- Try
- Q(B);
- Vars
- R(e);N_GUARD::R(F)
- R(e);N_GUARD,P_PINP(D)::R(F)
- R(e);N_GUARD::R(F),XR(e)
- S(a);N_GUARD::B(A),XS(b)
- P(f);N_GUARD::S(G)
- P(h);N_GUARD::S(G)
- Refutation
- R(e);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- R(e);N_GUARD::R(F)
- Refutation
- R(e);
- Try
- Q(B);
- Threat
- QAR(B),XR(e)
- Vars
- K(d);N_SPINS(b),P-FLIGHT::QAR2(B),XR(e)
- R(e);N_GUARD,XQ(B)::R(F)
- R(e);N_GUARD,P_PINP(D)::R(F)
- R(e);N_GUARD::R(F)
- Refutation
- R(e);
- Try
- P(D);
- Threat
- QAB(B)
- Vars
- S(a);N_GUARD::B(A),XS(b)
- Refutation
- R(e);CHECK
- Try
- Actual
- Q(B);
- Threat
- QAR(B),XR(e)
- Vars
- K(d);N_SPINS(b),P-FLIGHT::QAR2(B),XR(e)
- R(e);N_GUARD::R(F)
- R(e);N_GUARD,P_PINP(D)::R(F)
- R(e);SBLOCK::QAR(B)+K(C)
- R(e);N_GUARD::R(F),XR(e)
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).