MESON Chess Problem Database
Problem Display
PID: 227304 (B4b2/1r6/4pqbp/5k1P/3P2Np/Qpp4K/4R3/2B5 w - - 0 1)
Horan, Ken
US Problem Bulletin, 1985
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Qe5
- 2.Rxe5#
- 1...Qg5
- 2.Re5#
- 1...Qe7
- 2.Re5#
- 1...Qd8
- 2.Re5#
- 1...Qf7
- 2.Re5#
- 1...Rb4
- 2.Be4#
- 2.Rf2#
- 1...Rb5
- 2.Be4#
- 2.Rf2#
- 1...Rb6
- 2.Be4#
- 2.Rf2#
- 1...Ra7
- 2.Be4#
- 2.Rf2#
- 1...Rc7
- 2.Be4#
- 2.Rf2#
- 1...Rd7
- 2.Be4#
- 2.Rf2#
- 1...Re7
- 2.Be4#
- 2.Rf2#
- 1...Rf7
- 2.Be4#
- 2.Rf2#
- 1...Rg7
- 2.Sxh6#
- 2.Be4#
- 2.Rf2#
- 1...Rh7
- 2.Be4#
- 2.Rf2#
- 1...Rb8
- 2.Be4#
- 2.Rf2#
- 1...Bxa3
- 2.Sxh6#
- 1...Bb4
- 2.Sxh6#
- 1...Bc5
- 2.Sxh6#
- 1...Bd6
- 2.Sxh6#
- 1...Be7
- 2.Sxh6#
- 1...Qe5
- Tries
- 1.Qc5+?
- 1...Qe5
- 2.Rxe5#
- 2.Qxe5#
- 1...Bxc5
- 2.Sxh6#
- 1...e5!
- 1...Qe5
- 1.Qd6?
- threat
- 2.Qf4#
- 1...Qxd4
- 2.Qxe6#
- 1...Bxd6
- 2.Sxh6#
- 1...Qe5
- 2.Rxe5#
- 2.Qxe5#
- 1...Qg5
- 2.Re5#
- 2.Qe5#
- 2.Qxe6#
- 1...e5
- 2.Qxf6#
- 1...Bxh5!
- threat
- 1.Qe7?
- threat
- 2.Qxf6#
- 1...Qxd4
- 2.Qxe6#
- 1...Qxe7
- 2.Re5#
- 1...Rxe7
- 2.Be4#
- 2.Rf2#
- 1...Bxe7
- 2.Sxh6#
- 1...Qe5
- 2.Rxe5#
- 1...Qg5
- 2.Re5#
- 2.Qxe6#
- 1...Qg7
- 2.Qxe6#
- 1...Qh8
- 2.Qxe6#
- 1...Qf7
- 2.Re5#
- 1...Bg7!
- threat
- 1.Qxf8?
- threat
- 2.Sxh6#
- 2.Re5#
- 2.Qxf6#
- 1...Qxf8
- 2.Re5#
- 1...Bxh5
- 2.Qxf6#
- 1...e5
- 2.Rxe5#
- 2.Qxf6#
- 1...Qf7
- 2.Re5#
- 1...Rb5
- 2.Sxh6#
- 2.Be4#
- 2.Rf2#
- 2.Qxf6#
- 1...Rf7
- 2.Sxh6#
- 2.Be4#
- 2.Rf2#
- 1...Rh7
- 2.Be4#
- 2.Rf2#
- 2.Re5#
- 2.Qxf6#
- 1...Bf7!
- threat
- 1.Qxb3?
- threat
- 2.Qc2#
- 1...Qxd4
- 2.Qxe6#
- 1...Rxb3
- 2.Be4#
- 2.Rf2#
- 1...Qe5
- 2.Rxe5#
- 1...c2
- 2.Qxc2#
- 2.Qd3#
- 2.Qf3#
- 1...e5!
- threat
- 1.Qa5+?
- 1...Qe5
- 2.Rxe5#
- 2.Qxe5#
- 1...Rb5
- 2.Be4#
- 2.Rf2#
- 1...Bc5
- 2.Sxh6#
- 1...e5!
- 1...Qe5
- 1.Qc5+?
- Keys
- 1.Qa6!
- threat
- 2.Qd3#
- 1...Qxd4
- 2.Qxe6#
- 1...e5
- 2.Qxf6#
- 1...Qe5
- 2.Rxe5#
- 1...Rb5
- 2.Be4#
- 2.Rf2#
- threat
- 1.Qa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- Q(f);N_GUARD::R1(B),XQ(f)
- Q(f);N_GUARD::R1(B)
- B(j);N_GUARD,XQ(C)::S(F),XP(h)
- B(j);N_GUARD::S(F),XP(h)
- Tries
- Try
- Q(C);CHECK
- Vars
- B(j);XQ(C)::S(F),XP(h)
- Refutation
- P(e);P_SPINP(e)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- Q(f);N_GUARD,XP(E)::QAB1(C),XP(e)
- B(j);N_GUARD,XQ(C)::S(F),XP(h)
- P(e);OGATE::QAR1(C),XQ(f)
- Refutation
- B(g);XP(G)
- Try
- Q(C);
- Threat
- QAR1(C),XQ(f)
- Vars
- Q(f);N_GUARD,XP(E)::QAB1(C),XP(e)
- Q(f);N_GUARD,XQ(C)::R1(B)
- B(j);N_GUARD,XQ(C)::S(F),XP(h)
- Q(f);N_GUARD::R1(B),XQ(f)
- Q(f);N_GUARD::QAB1(C),XP(e)
- Q(f);N_GUARD::R1(B)
- Refutation
- B(j);
- Try
- Q(C);P_PINQ(f),XB(j)
- Threat
- DUALS(3)
- Vars
- Q(f);N_SPINQ(f),XQ(C)::R1(B)
- B(g);XP(G)::QAR1(C),XQ(f)
- Q(f);::R1(B)
- Refutation
- B(g);N_SPINQ(f)
- Try
- Q(C);XP(a)
- Threat
- QAB(C)
- Vars
- Q(f);N_GUARD,XP(E)::QAB1(C),XP(e)
- Q(f);N_GUARD::R1(B),XQ(f)
- Refutation
- P(e);
- Try
- Q(C);CHECK
- Vars
- B(j);P_SPINB(j)::S(F),XP(h)
- Refutation
- P(e);P_SPINP(e)
- Try
- Actual
- Q(C);
- Threat
- QAB(C)
- Vars
- Q(f);N_GUARD,XP(E)::QAB1(C),XP(e)
- P(e);OGATE::QAR1(C),XQ(f)
- Q(f);N_GUARD::R1(B),XQ(f)
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).