MESON Chess Problem Database
Problem Display
PID: 622 (3Nb3/2K2p2/4p3/4k2p/1p5B/1n2PB2/2Qn3N/3R4 w - - 0 1)
Blake, Percy Francis
British Chess Magazine, 1892
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxc6#
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sxf3
- 2.Sxf3#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f6
- 2.Bg3#
- 1...Ba4
- Tries
- 1.Kb6?
- 1...Kd6
- 2.Qc7#
- 1...Sxf3
- 2.Sxf3#
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f5
- 2.Qc7#
- 1...f6
- 2.Bg3#
- 1...Sc4+!
- 1...Kd6
- 1.Kc8?
- 1...Kd6
- 2.Qc7#
- 1...Sxf3
- 2.Sxf3#
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f5
- 2.Qc7#
- 1...f6
- 2.Bg3#
- 1...Bd7+!
- 1...Kd6
- 1.Bh1?
- 1...Se4
- 2.Qxe4#
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxc6#
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb1
- 2.Sf3#
- 2.Qe4#
- 1...Sf1
- 2.Sf3#
- 2.Qe4#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 2.Qe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f6
- 2.Bg3#
- 1...f5!
- 1...Se4
- 1.Bg2?
- 1...Se4
- 2.Qxe4#
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxc6#
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb1
- 2.Sf3#
- 2.Qe4#
- 1...Sf1
- 2.Sf3#
- 2.Qe4#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 2.Qe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f6
- 2.Bg3#
- 1...f5!
- 1...Se4
- 1.Bg5?
- 1...Sxf3
- 2.Sxf3#
- 1...Se4
- 2.Qxe4#
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxc6#
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...h4
- 2.Sg4#
- 1...f6
- 2.Bf4#
- 1...f5!
- 1...Sxf3
- 1.Be7?
- 1...Sxf3
- 2.Sxf3#
- 1...Se4
- 2.Qxe4#
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxc6#
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...h4
- 2.Sg4#
- 1...f6
- 2.Bd6#
- 1...f5!
- 1...Sxf3
- 1.Rxd2?
- threat
- 2.Qe4#
- 1...Sxd2
- 2.Qc5#
- 1...Bc6
- 2.Sxc6#
- 2.Sxf7#
- 1...Sc5
- 2.Qxc5#
- 1...f5!
- threat
- 1.Qg6?
- threat
- 2.Bg3#
- 2.Bf6#
- 2.Qf6#
- 1...Sxf3
- 2.Sxf3#
- 2.Bg3#
- 2.Bf6#
- 1...f5
- 2.Bf6#
- 2.Qxe6#
- 2.Qf6#
- 2.Qg7#
- 1...Sf1
- 2.Bf6#
- 2.Qe4#
- 2.Qf6#
- 1...Se4
- 2.Qxe4#
- 1...f6
- 2.Bg3#
- 2.Bxf6#
- 2.Qxf6#
- 1...fxg6!
- threat
- 1.Qb2+?
- 1...Kf5
- 2.Qf6#
- 1...Sd4!
- 1...Kf5
- 1.Qc3+?
- 1...Kf5
- 2.Qf6#
- 1...Sd4
- 2.Qc5#
- 1...bxc3!
- 1...Kf5
- 1.Kb6?
- Keys
- 1.Kb8!
- 1...Kd6
- 2.Qc7#
- 1...Sxf3
- 2.Sxf3#
- 1...Ba4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f5
- 2.Qc7#
- 1...f6
- 2.Bg3#
- 1...Kd6
- 1.Kb8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::QAR1(B)
- S(a);XB(E)::S(C),XS(a)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(g);SBLOCK::B(F)
- Tries
- Try
- K(G);S_FLIGHT
- Vars
- K(d);P_SPINS(a),S_FLIGHT::QAB1(B)
- S(a);XB(E)::S(C),XS(a)
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(g);SBLOCK::QAB(B)
- P(g);SBLOCK::B(F)
- Refutation
- S(a);CHECK
- Try
- K(G);P-FLIGHT
- Vars
- K(d);P_SPINS(a),S_FLIGHT::QAB1(B)
- S(a);XB(E)::S(C),XS(a)
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(g);SBLOCK::QAB(B)
- P(g);SBLOCK::B(F)
- Refutation
- B(h);CHECK
- Try
- B(E);
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::S(C),XS(a)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(g);SBLOCK::B(F)
- Refutation
- P(g);
- Try
- B(E);
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::S(C),XS(a)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(g);SBLOCK::B(F)
- Refutation
- P(g);
- Try
- B(F);
- Vars
- S(a);XB(E)::S(C),XS(a)
- S(a);N_GUARD::QAR1(B),XS(a)
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(e);N_GUARD::S(C)
- P(g);SBLOCK::B(F)
- Refutation
- P(g);
- Try
- B(F);
- Vars
- S(a);XB(E)::S(C),XS(a)
- S(a);N_GUARD::QAR1(B),XS(a)
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(e);N_GUARD::S(C)
- P(g);SBLOCK::B(F)
- Refutation
- P(g);
- Try
- R(A);XS(a)
- Threat
- QAR1(B)
- Vars
- S(b);N_GUARD,XR(A)::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- Refutation
- P(g);
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- Refutation
- P(g);XQ(B)
- Try
- Q(B);CHECK
- Vars
- K(d);OGATE,P-FLIGHT::QAR1(B)
- Refutation
- S(b);P_SPINS(b)
- Try
- Q(B);CHECK
- Vars
- K(d);OGATE,P-FLIGHT::QAR1(B)
- S(b);N_GUARD,P_SPINS(b)::QAR2(B)
- Refutation
- P(c);XQ(B)
- Try
- Actual
- K(G);S_FLIGHT
- Vars
- K(d);P_SPINS(a),S_FLIGHT::QAB1(B)
- S(a);XB(E)::S(C),XS(a)
- B(h);N_GUARD::S(H),XP(g)
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAR2(B)
- S(b);N_GUARD::QAR2(B),XS(b)
- P(g);SBLOCK::QAB(B)
- P(g);SBLOCK::B(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).