MESON Chess Problem Database
Problem Display
PID: 22230 (3qrB2/b2p1p2/N1p1PPpp/2pkN3/7R/6QB/b1P5/K7 w - - 0 1)
Hirschenson, Aaron
3rd Prize, Pituk-90 JT, 1994-1997
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxf6
- 2.Sc7#
- 1...Qc7
- 2.Sxc7#
- 1...Qa8
- 2.Sc7#
- 1...Rxe6
- 2.Bg2#
- 1...Bb1
- 2.c4#
- 1...c4
- 2.Sb4#
- 1...dxe6
- 2.Bg2#
- 1...fxe6
- 2.Bg2#
- 1...Qxf6
- Tries
- 1.Sc4?
- threat
- 2.Se3#
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Rxe6
- 2.Qd3#
- 1...Bxc4
- 2.Qd6#
- 1...dxe6
- 2.Se3#
- 2.Bg2#
- 2.Qe5#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qc7
- 2.Se3#
- 2.Sxc7#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qe7
- 2.Se3#
- 2.Sc7#
- 2.Qe5#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qb8
- 2.Se3#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Bb8
- 2.Se3#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...d6
- 2.Se3#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qxf6+!
- threat
- 1.Sxg6?
- threat
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Rxe6
- 2.Qd3#
- 1...Rxf8
- 2.Qe5#
- 2.Qd3#
- 1...dxe6
- 2.Bg2#
- 2.Qe5#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...fxg6
- 2.Qd6#
- 1...Qc7
- 2.Sxc7#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qe7
- 2.Sc7#
- 2.Qe5#
- 2.Qd3#
- 1...Qb8
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Re7
- 2.Qe5#
- 2.Qd3#
- 1...Bc4
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qf3#
- 1...Bb8
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...c4
- 2.Sb4#
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qf3#
- 1...d6
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qxf6+!
- threat
- 1.Sxd7?
- threat
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qxf6+
- 2.Sxf6#
- 1...Rxe6
- 2.Qd3#
- 1...Rxf8
- 2.Qe5#
- 2.Qd3#
- 1...Qc7
- 2.Sxc7#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qe7
- 2.Sc7#
- 2.Qe5#
- 2.Qd3#
- 1...Qb8
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Re7
- 2.Qe5#
- 2.Qd3#
- 1...Bc4
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qf3#
- 1...Bb8
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...c4
- 2.Sb4#
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qf3#
- 1...Qxd7!
- threat
- 1.Sxf7?
- threat
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Rxe6
- 2.Qd3#
- 1...dxe6
- 2.Bg2#
- 2.Qe5#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qc7
- 2.Sxc7#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qe7
- 2.Sc7#
- 2.Qe5#
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qb8
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Bc4
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qf3#
- 1...Bb8
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...c4
- 2.Sb4#
- 2.Qe5#
- 2.Qd6#
- 2.Qg2#
- 2.Qf3#
- 1...d6
- 2.Qg2#
- 2.Qd3#
- 2.Qf3#
- 1...Qxf6+!
- threat
- 1.Sc4?
- Keys
- 1.Sg4!
- threat
- 2.Se3#
- 1...Qxf6+
- 2.Sxf6#
- 1...Kc4
- 2.Qd3#
- 1...Kd4
- 2.Qd3#
- 1...Ke4
- 2.Se3#
- 1...Kxe6
- 2.Qe5#
- 1...Rxe6
- 2.Qd3#
- 1...c4
- 2.Qe5#
- threat
- 1.Sg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(j);N_GUARD,P_PINS(F),XP(I)::S(G)
- Q(j);N_GUARD::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- R(k);SBLOCK,XP(H)::B(D)
- B(a);N_GUARD::P(B)
- P(b);N_GUARD::S(G)
- P(h);SBLOCK,XP(H)::B(D)
- P(i);SBLOCK,XP(H)::B(D)
- Tries
- Try
- S(F);
- Threat
- DUALS(6)
- Vars
- R(k);XP(H)::QAR2(C)
- B(a);XS(F)::QAR1(C)
- Refutation
- Q(j);CHECK,XP(I)
- Try
- S(F);XP(e)
- Threat
- DUALS(5)
- Vars
- R(k);XP(H)::QAR2(C)
- P(i);XS(F)::QAR1(C)
- Refutation
- Q(j);CHECK,XP(I)
- Try
- S(F);XP(h)
- Threat
- DUALS(5)
- Vars
- Q(j);CHECK,XP(I)::S(F),XQ(j)
- R(k);XP(H)::QAR2(C)
- Refutation
- Q(j);XS(F)
- Try
- S(F);XP(i)
- Threat
- DUALS(5)
- Vars
- R(k);XP(H)::QAR2(C)
- Refutation
- Q(j);CHECK,XP(I)
- Try
- Actual
- S(F);
- Threat
- S(F)
- Vars
- Q(j);CHECK,XP(I)::S(F),XQ(j)
- K(c);S_FLIGHT::QAB1(C)
- K(c);P-FLIGHT::QAR1(C)
- K(c);S_FLIGHT::R(E)+S(F)
- K(c);S_FLIGHT,XP(H)::QAR1(C)
- R(k);SBLOCK,XP(H)::QAR2(C)
- P(b);SBLOCK::QAR1(C)
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).