MESON Chess Problem Database
Problem Display
PID: 152489 (1K3N2/3B3P/pR1n3n/3Pk3/q3P2B/2P1R2N/3Q1pr1/5br1 w - - 0 1)
Erokhin, Vladimir Alekseevich
L'Italia Scacchistica, 1985
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Qd4#
- 1...Qb3
- 2.Qd4#
- 1...Qb5
- 2.Qd4#
- 1...Qc6
- 2.Qd4#
- 1...Qxd7
- 2.Sxd7#
- 2.Qd4#
- 1...Qa1
- 2.Qd4#
- 1...Qa2
- 2.Qd4#
- 1...Qa3
- 2.Qd4#
- 1...Qd4
- 2.Qxd4#
- 2.cxd4#
- 1...Qxe4
- 2.Qd4#
- 1...Qa5
- 2.Qd4#
- 1...Bc4
- 2.Qd4#
- 1...Sc4
- 2.Bf6#
- 2.Re6#
- 2.Qd4#
- 1...Sxe4
- 2.Bf6#
- 1...Sb5
- 2.Bf6#
- 2.Re6#
- 1...Sdf5
- 2.Bf6#
- 2.Re6#
- 1...Sb7
- 2.Bf6#
- 2.Re6#
- 1...Sdf7
- 2.Bf6#
- 2.Re6#
- 1...Sc8
- 2.Bf6#
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...Sg4
- 2.Sg6#
- 1...Qc2
- Tries
- 1.Bg5?
- threat
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Qxd7
- 2.Sg6#
- 2.Sxd7#
- 2.Qd4#
- 1...Qxe4
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Sxe4
- 2.Sg6#
- 2.Bf4#
- 2.Bf6#
- 2.h8Q#
- 2.h8B#
- 1...Qd1
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Qc2
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qb3
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qb5
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qc6
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qa1
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qa2
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qa3
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qb4
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Qc4
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Qd4
- 2.Sg6#
- 2.Qxd4#
- 2.cxd4#
- 2.h8Q#
- 2.h8B#
- 1...Qa5
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Rh1
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Rh2
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Rg3
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Rg4
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Be2
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Bd3
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Bc4
- 2.Sg6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Bb5
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Sc4
- 2.Sg6#
- 2.Bf4#
- 2.Bf6#
- 2.Re6#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Sb5
- 2.Sg6#
- 2.Bf4#
- 2.Bf6#
- 2.Re6#
- 2.h8Q#
- 2.h8B#
- 1...Sdf5
- 2.Sg6#
- 2.Bf4#
- 2.Bf6#
- 2.Re6#
- 1...Sb7
- 2.Sg6#
- 2.Bf4#
- 2.Bf6#
- 2.Re6#
- 2.h8Q#
- 2.h8B#
- 1...Sdf7
- 2.Sg6#
- 2.Bf4#
- 2.Bf6#
- 2.Re6#
- 1...Sc8
- 2.Sg6#
- 2.Bf4#
- 2.Bf6#
- 2.Re6#
- 2.h8Q#
- 2.h8B#
- 1...Se8
- 2.Sg6#
- 2.Bf4#
- 2.Re6#
- 1...Sg4
- 2.Sg6#
- 1...Shf5
- 2.Sg6#
- 1...Shf7
- 2.Sg6#
- 1...Sg8
- 2.Sg6#
- 1...a5
- 2.Sg6#
- 2.h8Q#
- 2.h8B#
- 1...Rxg5!
- threat
- 1.Bxa4?
- threat
- 2.Sd7#
- 2.Qd4#
- 1...Rg7
- 2.Qd4#
- 1...Rg8
- 2.Qd4#
- 1...Bd3
- 2.Sd7#
- 1...Bb5
- 2.Qd4#
- 1...Sb5
- 2.Sd7#
- 2.Bf6#
- 2.Re6#
- 1...Sdf5
- 2.Sd7#
- 2.Bf6#
- 2.Re6#
- 1...Shf5
- 2.Sd7#
- 1...Sxe4!
- threat
- 1.Re1?
- threat
- 2.Qf4#
- 1...Qxe4
- 2.Qd4#
- 1...Sxe4
- 2.Bf6#
- 1...Rg4!
- threat
- 1.Re2?
- threat
- 2.Qf4#
- 1...Qxe4
- 2.Qd4#
- 1...Sxe4
- 2.Bf6#
- 1...Rg4!
- threat
- 1.Rf3?
- threat
- 2.Qf4#
- 1...Kxe4
- 2.Re3#
- 1...Qxe4
- 2.Bf6#
- 1...Sxe4
- 2.Re6#
- 1...Rg4!
- threat
- 1.Bg5?
- Keys
- 1.Rg3!
- threat
- 2.Qf4#
- 1...Kxe4
- 2.Re3#
- 1...Qxe4
- 2.h8Q#
- 2.h8B#
- 1...Sxe4
- 2.Sg6#
- threat
- 1.Rg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 12
- Sets
- Q(e);N_GUARD::QAB1(A)
- Q(e);N_GUARD,P_PINR(H)::QAB1(A)
- Q(e);N_GUARD,P_SPINQ(e),XP(E)::QAB1(A)
- B(a);S_CUTQ(e)::QAB1(A)
- S(h);P_SPINS(h),XP(E)::B(F)
- S(h);OGATE::R1(H)
- S(i);S_CUTR(d)::S(L)
- Tries
- Try
- B(F);
- Threat
- DUALS(3)
- Vars
- S(i);::S(L)
- Refutation
- R(d);XB(F)
- Try
- B(I);XQ(e)
- Threat
- DUALS(2)
- Vars
- R(d);::QAB1(A)
- R(d);P_PINS(L)::QAB1(A)
- B(a);::S(L)
- B(a);::QAB1(A)
- S(i);::S(L)
- Refutation
- S(h);P_SPINS(h),XP(E)
- Try
- R(C);
- Threat
- QAB1(A)
- Vars
- Q(e);N_GUARD,P_SPINQ(e),XP(E)::QAB1(A)
- S(h);P_SPINS(h),XP(E)::B(F)
- Refutation
- R(d);
- Try
- R(C);
- Threat
- QAB1(A)
- Vars
- Q(e);N_GUARD,P_SPINQ(e),XP(E)::QAB1(A)
- S(h);P_SPINS(h),XP(E)::B(F)
- Refutation
- R(d);
- Try
- R(C);
- Threat
- QAB1(A)
- Vars
- K(f);OGATEB,P-FLIGHT,XP(E)::R1(C)
- Q(e);SBLOCK,XP(E)::B(F)
- S(h);OGATE,SBLOCK,XP(E)::R1(H)
- Refutation
- R(d);
- Try
- Actual
- R(C);
- Threat
- QAB1(A)
- Vars
- K(f);OGATEB,P-FLIGHT,XP(E)::R1(C)
- Q(e);SBLOCK,XP(E)::P=Q
- S(h);SBLOCK,XP(E)::S(L)
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).