MESON Chess Problem Database
Problem Display
PID: 274813 (r2k4/P7/BP2R3/1NN2p2/5pbb/K1Q3q1/3PPBp1/3R4 w - - 0 1)
Segers, Marcel
Die Schwalbe, 1933
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxf2
- 2.Qh8#
- 1...Qh2
- 2.Qd4#
- 2.Qh8#
- 2.Qd3#
- 1...Qxc3+
- 2.dxc3#
- 1...Qd3
- 2.Bxh4#
- 2.Qxd3#
- 1...Qe3
- 2.Bxh4#
- 2.dxe3#
- 1...Qf3
- 2.Bxh4#
- 1...Rb8
- 2.axb8Q#
- 2.axb8R#
- 1...f3
- 2.Qh8#
- 1...Qxf2
- Tries
- 1.Bxg3?
- threat
- 2.Bxh4#
- 2.Qd4#
- 2.Qh8#
- 2.Qd3#
- 1...Rxa7
- 2.Qh8#
- 1...Bxe2
- 2.Bxh4#
- 2.Qd4#
- 2.Qh8#
- 1...Bxg3
- 2.Qd4#
- 2.Qf6#
- 2.Qh8#
- 2.Qd3#
- 1...fxg3
- 2.Qd4#
- 2.Qh8#
- 2.Qd3#
- 1...g1Q
- 2.Bxh4#
- 2.Qh8#
- 1...g1B
- 2.Bxh4#
- 2.Qh8#
- 1...Bf3
- 2.Bxh4#
- 2.Qh8#
- 1...Bh5
- 2.Bxh4#
- 2.Qd4#
- 2.Qd3#
- 1...Bg5
- 2.Qd4#
- 2.Qh8#
- 2.Qd3#
- 1...Bf6
- 2.Qxf6#
- 1...Be7!
- threat
- 1.Bxg3?
- Keys
- 1.b7!
- threat
- 2.bxa8Q#
- 2.bxa8R#
- 1...Qxc3+
- 2.dxc3#
- 1...Qxf2
- 2.Qa5#
- 2.Qh8#
- 2.bxa8Q#
- 2.bxa8R#
- 1...Rxa7
- 2.b8Q#
- 2.b8R#
- 1...Bxe2
- 2.bxa8Q#
- 2.bxa8R#
- 1...Be7
- 2.bxa8Q#
- 2.bxa8R#
- 1...g1Q
- 2.bxa8Q#
- 2.bxa8R#
- 1...g1S
- 2.bxa8Q#
- 2.bxa8R#
- 1...g1B
- 2.bxa8Q#
- 2.bxa8R#
- 1...g1R
- 2.bxa8Q#
- 2.bxa8R#
- 1...Bf3
- 2.Qa5#
- 1...Qh2
- 2.Qd4#
- 2.Qa5#
- 2.Qh8#
- 2.Qd3#
- 2.bxa8Q#
- 2.bxa8R#
- 1...Qd3
- 2.Bxh4#
- 2.Qxd3#
- 2.bxa8Q#
- 2.bxa8R#
- 1...Qe3
- 2.Bxh4#
- 2.dxe3#
- 2.bxa8Q#
- 2.bxa8R#
- 1...Qf3
- 2.Bxh4#
- 1...Qh3
- 2.bxa8Q#
- 2.bxa8R#
- 1...Rb8
- 2.axb8Q#
- 2.axb8R#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Bh3
- 2.bxa8Q#
- 2.bxa8R#
- 1...Bh5
- 2.bxa8Q#
- 2.bxa8R#
- 1...Bg5
- 2.bxa8Q#
- 2.bxa8R#
- 1...Bf6
- 2.bxa8Q#
- 2.bxa8R#
- 1...f3
- 2.Qh8#
- threat
- 1.b7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- Q(b);N_PINQ(F),XB(D)::QAR(F)
- Q(b);CHECK,OGATE,XQ(F)::R(A)+P(B),XQ(b)
- Q(b);OGATE::B(D),XB(e)
- R(g);OGATE::PXR(g)=Q
- P(c);N_PINQ(F)::QAR(F)
- Tries
- Try
- B(D);N_SPINQ(F),XQ(b)
- Threat
- DUALS(4)
- Vars
- R(g);P_PINB(I),XP(L)::QAR(F)
- B(e);N_GUARD::QAB(F),XB(e)
- Refutation
- B(e);P_PINS(H)
- Try
- Actual
- P(J);
- Threat
- PXR(g)=Q
- Vars
- Q(b);CHECK,OGATE,XQ(F)::R(A)+P(B),XQ(b)
- R(g);N_GUARD,P_PINB(I),XP(L)::P=Q
- B(d);XP(C)::PXR(g)=Q
- B(e);P_PINS(H)::PXR(g)=Q
- P(a);::PXR(g)=Q
- B(d);N_PINQ(F)::QAB(F)
- Q(b);OGATE::B(D),XB(e)
- Q(b);::PXR(g)=Q
- R(g);OGATE::PXR(g)=Q
- B(d);::PXR(g)=Q
- B(e);::PXR(g)=Q
- P(c);N_PINQ(F)::QAR(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).