MESON Chess Problem Database
Problem Display
PID: 104868 (8/1K2Q3/n3B3/6B1/4k1N1/1N1R3q/1n2p3/4b3 w - - 0 1)
St Maurice, Ephrem
La Presse, 1923
#2
7 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Re3#
- 1...Qg2
- 2.Re3#
- 2.Qh7#
- 1...Qxg4
- 2.Re3#
- 1...Qh1
- 2.Re3#
- 1...Qh2
- 2.Re3#
- 1...Qe3
- 2.Rxe3#
- 1...Qf3
- 2.Rd4#
- 1...Qg3
- 2.Qh7#
- 1...Qh4
- 2.Re3#
- 1...Qh5
- 2.Re3#
- 1...Qh6
- 2.Re3#
- 1...Qh7
- 2.Re3#
- 2.Qxh7#
- 1...Qh8
- 2.Re3#
- 1...Bg3
- 2.Re3#
- 1...Bh4
- 2.Qh7#
- 1...Sb4
- 2.Sc5#
- 1...Sc5+
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Qf1
- Tries
- 1.Sf2+?
- 1...Ke5
- 2.Bxh3#
- 2.Bg4#
- 2.Rd5#
- 2.Qd6#
- 2.Qf6#
- 1...Bxf2!
- 1...Ke5
- 1.Sf6+?
- 1...Ke5
- 2.Bxh3#
- 2.Bg4#
- 2.Rd5#
- 2.Qd6#
- 1...Kxd3!
- 1...Ke5
- 1.Qb4+?
- 1...Kxd3
- 2.Bf5#
- 1...Sc4
- 2.Qxc4#
- 1...Sxb4
- 2.Sc5#
- 1...Bxb4!
- 1...Kxd3
- 1.Qc5?
- threat
- 2.Bf5#
- 2.Qd4#
- 2.Qd5#
- 2.Qf5#
- 1...Sxc5+
- 2.Sxc5#
- 1...Kxd3
- 2.Bf5#
- 1...Qxg4
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qd5#
- 1...Qxd3
- 2.Qf5#
- 1...Sxd3
- 2.Qd5#
- 2.Qf5#
- 2.Qc6#
- 1...Qe3
- 2.Rxe3#
- 2.Qxe3#
- 2.Qd5#
- 2.Qf5#
- 1...Qf1
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qd5#
- 1...Qf3
- 2.Rd4#
- 2.Qd4#
- 2.Qd5#
- 1...Qh8
- 2.Bf5#
- 2.Re3#
- 2.Qe3#
- 2.Qd5#
- 2.Qf5#
- 1...Bf2
- 2.Sxf2#
- 2.Bf5#
- 2.Qd5#
- 2.Qf5#
- 1...Bc3
- 2.Sf2#
- 2.Bf5#
- 2.Qd5#
- 2.Qf5#
- 1...Sb4
- 2.Bf5#
- 2.Qd4#
- 2.Qf5#
- 1...Sc7
- 2.Bf5#
- 2.Qd4#
- 2.Qf5#
- 1...Qh7+!
- threat
- 1.Qd6?
- threat
- 2.Sf6#
- 2.Qd4#
- 2.Qd5#
- 1...Sc5+
- 2.Sxc5#
- 1...Qxg4
- 2.Re3#
- 2.Qd4#
- 2.Qd5#
- 1...Qxd3
- 2.Qf4#
- 1...Sxd3
- 2.Qd5#
- 2.Qc6#
- 1...Qe3
- 2.Rxe3#
- 2.Qd5#
- 1...Qf1
- 2.Re3#
- 2.Qd4#
- 2.Qd5#
- 1...Qf3
- 2.Rd4#
- 2.Qd4#
- 2.Qd5#
- 1...Qh6
- 2.Re3#
- 2.Qd4#
- 2.Qd5#
- 1...Qh8
- 2.Re3#
- 2.Qd5#
- 1...Bf2
- 2.Sd2#
- 2.Sxf2#
- 2.Sf6#
- 2.Qd5#
- 1...Bc3
- 2.Sf2#
- 2.Qd5#
- 1...Sb4
- 2.Sc5#
- 2.Sf6#
- 2.Qd4#
- 1...Sc7
- 2.Sc5#
- 2.Sf6#
- 2.Qd4#
- 1...Qh7+!
- threat
- 1.Qd7?
- threat
- 2.Bf5#
- 2.Qd4#
- 2.Qd5#
- 1...Sc5+
- 2.Sxc5#
- 1...Qxg4
- 2.Re3#
- 2.Qd4#
- 2.Qd5#
- 1...Sxd3
- 2.Bd5#
- 2.Qc6#
- 2.Qd5#
- 1...Qe3
- 2.Rxe3#
- 2.Qd5#
- 1...Qf1
- 2.Re3#
- 2.Qd4#
- 2.Qd5#
- 1...Qf3
- 2.Rd4#
- 2.Qd4#
- 2.Qd5#
- 1...Qh7
- 2.Re3#
- 2.Qxh7#
- 1...Qh8
- 2.Bf5#
- 2.Re3#
- 2.Qd5#
- 1...Bf2
- 2.Sd2#
- 2.Bf5#
- 2.Qd5#
- 1...Bc3
- 2.Bf5#
- 2.Qd5#
- 1...Sb4
- 2.Sc5#
- 2.Bf5#
- 2.Qd4#
- 1...Sc7
- 2.Sc5#
- 2.Bf5#
- 2.Qd4#
- 1...Qxd3!
- threat
- 1.Qf7?
- threat
- 2.Bf5#
- 2.Rd4#
- 2.Qg6#
- 2.Qf5#
- 1...Sc5+
- 2.Sxc5#
- 1...Qxg4
- 2.Re3#
- 1...Qxd3
- 2.Qf4#
- 2.Qf5#
- 1...Sxd3
- 2.Bd5#
- 2.Qf5#
- 1...Qf1
- 2.Re3#
- 2.Rd4#
- 1...Qe3
- 2.Rxe3#
- 2.Qf5#
- 1...Qf3
- 2.Rd4#
- 2.Qxf3#
- 1...Qh5
- 2.Bf5#
- 2.Re3#
- 2.Rd4#
- 2.Qf3#
- 2.Qf5#
- 1...Qh6
- 2.Bf5#
- 2.Re3#
- 2.Rd4#
- 2.Qf3#
- 2.Qf5#
- 1...Qh7
- 2.Re3#
- 2.Rd4#
- 2.Qxh7#
- 1...Qh8
- 2.Bf5#
- 2.Re3#
- 2.Qg6#
- 2.Qf3#
- 2.Qf5#
- 1...Bf2
- 2.Bf5#
- 2.Qg6#
- 2.Qf5#
- 1...Bc3
- 2.Bf5#
- 2.Qg6#
- 2.Qf5#
- 1...Kxd3!
- threat
- 1.Sf2+?
- Keys
- 1.Qc7!
- 1...Sc5+
- 2.Sxc5#
- 1...Kxd3
- 2.Bf5#
- 1...Qxg4
- 2.Re3#
- 1...Qxd3
- 2.Qf4#
- 1...Sxd3
- 2.Qc6#
- 1...Sxc7
- 2.Sc5#
- 1...Qe3
- 2.Rxe3#
- 1...Qf1
- 2.Re3#
- 1...Qg2
- 2.Re3#
- 2.Qh7#
- 1...Qh1
- 2.Re3#
- 1...Qh2
- 2.Re3#
- 1...Qf3
- 2.Rd4#
- 1...Qg3
- 2.Qh7#
- 1...Qh4
- 2.Re3#
- 1...Qh5
- 2.Re3#
- 1...Qh6
- 2.Re3#
- 1...Qh7
- 2.Re3#
- 2.Qxh7#
- 1...Qh8
- 2.Re3#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Bc3
- 2.Sf2#
- 1...Bg3
- 2.Re3#
- 1...Bb4
- 2.Sf2#
- 1...Bh4
- 2.Qh7#
- 1...Ba5
- 2.Sf2#
- 1...Sd1
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sb4
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Sc5+
- 1.Qc7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 11
- REMOVED MATES = 0
- Sets
- Q(d);N_GUARD::R1(B)
- Q(d);N_GUARD,XS(C)::R1(B)
- Q(d);N_GUARD::R1(B),XQ(d)
- Q(d);SBLOCK::R1(B)
- Q(d);N_GUARD::QAB(G)
- B(a);S_CUTQ(d)::R1(B)
- B(a);S_CUTQ(d)::QAB(G)
- S(f);N_GUARD::S(A)
- S(f);CHECK,N_GUARD::S(A),XS(f)
- Tries
- Try
- S(C);CHECK
- Refutation
- B(a);XS(C)
- Try
- S(C);CHECK
- Refutation
- K(e);S_FLIGHT,XR(B)
- Try
- Q(G);CHECK
- Vars
- K(e);S_FLIGHT,XR(B)::B(E)
- S(b);N_GUARD,P_SPINS(b)::QAR2(G),XS(b)
- S(f);XQ(G)::S(A)
- Refutation
- B(a);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(4)
- Vars
- S(f);CHECK,XQ(G)::S(A),XS(f)
- K(e);S_FLIGHT,XR(B)::B(E)
- Q(d);SBLOCK,XR(B)::QAB1(G)
- Refutation
- Q(d);CHECK
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- S(f);CHECK,N_GUARD::S(A),XS(f)
- Q(d);SBLOCK,XR(B)::QAR1(G)
- Refutation
- Q(d);CHECK
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- S(f);CHECK,N_GUARD::S(A),XS(f)
- Refutation
- Q(d);XR(B)
- Try
- Q(G);
- Threat
- DUALS(4)
- Vars
- S(f);CHECK,N_GUARD::S(A),XS(f)
- Q(d);N_GUARD,XS(C)::R1(B)
- Refutation
- K(e);S_FLIGHT,XR(B)
- Try
- Actual
- Q(G);
- Vars
- S(f);CHECK,N_GUARD::S(A),XS(f)
- K(e);S_FLIGHT,XR(B)::B(E)
- Q(d);N_GUARD,XS(C)::R1(B)
- Q(d);SBLOCK,XR(B)::QAR1(G)
- S(b);SBLOCK,XR(B)::QAB(G)
- S(f);N_GUARD,XQ(G)::S(A)
- Q(d);N_GUARD::R1(B),XQ(d)
- Q(d);N_GUARD::R1(B)
- Q(d);SBLOCK::R1(B)
- Q(d);N_GUARD::QAB(G)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- B(a);S_CUTQ(d)::R1(B)
- B(a);S_CUTQ(d)::QAB(G)
- S(b);N_GUARD::QAR2(G)
- S(b);N_GUARD::QAR2(G),XS(b)
- S(f);N_GUARD::S(A)
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).