MESON Chess Problem Database
Problem Display
PID: 53662 (8/2N2p2/1nN5/5p2/2QRBk2/1P1b4/K1p2BR1/8 w - - 0 1)
Helbig, J
Het Belgisch Schaakbord (L'Echiquier Belge), 1950
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Bd5#
- 1...Be2
- 2.Bd5#
- 1...Bxc4
- 2.Bd5#
- 1...Sa4
- 2.Sd5#
- 1...Sxc4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...c1Q
- 2.Qxc1#
- 1...c1S+
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...c1R
- 2.Qxc1#
- 1...fxe4
- 2.Qxf7#
- 1...f6
- 2.Se6#
- 1...Bf1
- Tries
- 1.Ka1?
- 1...c1Q+
- 2.Qxc1#
- 1...c1R+
- 2.Qxc1#
- 1...Bxc4
- 2.Bd5#
- 1...Sxc4
- 2.Sd5#
- 1...fxe4
- 2.Qxf7#
- 1...c1S
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...Bf1
- 2.Bd5#
- 1...Be2
- 2.Bd5#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...f6
- 2.Se6#
- 1...Bxe4!
- 1...c1Q+
- 1.Rg1?
- 1...c1S+
- 2.Qxc1#
- 1...Bxc4
- 2.Bh1#
- 2.Bd5#
- 1...Sxc4
- 2.Sd5#
- 1...fxe4
- 2.Qxf7#
- 1...c1Q
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...c1R
- 2.Qxc1#
- 1...Bf1
- 2.Bh1#
- 2.Bd5#
- 1...Be2
- 2.Bh1#
- 2.Bd5#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...f6
- 2.Se6#
- 1...Bxe4!
- 1...c1S+
- 1.Rg3?
- threat
- 2.Bxd3#
- 1...c1S+
- 2.Qxc1#
- 1...Bxc4
- 2.Bh1#
- 2.Bxc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 1...fxe4
- 2.Qxf7#
- 1...Bf1
- 2.Bh1#
- 2.Bxc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 1...Be2
- 2.Bh1#
- 2.Bxc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 1...Bxe4!
- threat
- 1.Rg7?
- 1...c1S+
- 2.Qxc1#
- 1...Bxc4
- 2.Bh1#
- 2.Bg2#
- 2.Bd5#
- 1...Sxc4
- 2.Sd5#
- 1...fxe4
- 2.Qxf7#
- 1...c1Q
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...c1R
- 2.Qxc1#
- 1...Bf1
- 2.Bh1#
- 2.Bg2#
- 2.Bd5#
- 1...Be2
- 2.Bh1#
- 2.Bg2#
- 2.Bd5#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...f6
- 2.Se6#
- 1...Bxe4!
- 1...c1S+
- 1.Rg8?
- 1...c1S+
- 2.Qxc1#
- 1...Bxc4
- 2.Bh1#
- 2.Bg2#
- 2.Bd5#
- 1...Sxc4
- 2.Sd5#
- 1...fxe4
- 2.Qxf7#
- 1...c1Q
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...c1R
- 2.Qxc1#
- 1...Bf1
- 2.Bh1#
- 2.Bg2#
- 2.Bd5#
- 1...Be2
- 2.Bh1#
- 2.Bg2#
- 2.Bd5#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...f6
- 2.Se6#
- 1...Bxe4!
- 1...c1S+
- 1.Qxd3?
- threat
- 2.Be3#
- 2.Bf3#
- 2.Bd5#
- 2.Bxf5#
- 2.Qd2#
- 2.Qe3#
- 2.Qf3#
- 2.Qg3#
- 1...fxe4
- 2.Qxe4#
- 1...c1Q
- 2.Bf3#
- 2.Bd5#
- 2.Bxf5#
- 2.Qf3#
- 2.Qg3#
- 1...c1B
- 2.Bf3#
- 2.Bd5#
- 2.Bxf5#
- 2.Qf3#
- 2.Qg3#
- 1...Sc4
- 2.Sd5#
- 2.Bf3#
- 2.Bd5#
- 2.Bxf5#
- 2.Qf3#
- 2.Qg3#
- 1...Sd5
- 2.Sxd5#
- 2.Bf3#
- 2.Bxd5#
- 2.Bxf5#
- 2.Qf3#
- 2.Qg3#
- 1...c1S+!
- threat
- 1.Qc3?
- threat
- 2.Qd2#
- 1...c1S+
- 2.Qxc1#
- 1...Bxe4
- 2.Qe3#
- 2.Qg3#
- 1...c1Q
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...Sc4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...fxe4!
- threat
- 1.Ka1?
- Keys
- 1.Bg1!
- 1...c1S+
- 2.Qxc1#
- 1...Bxc4
- 2.Bd5#
- 1...Bxe4
- 2.Qf1#
- 1...Sxc4
- 2.Sd5#
- 1...fxe4
- 2.Qxf7#
- 1...c1Q
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...c1R
- 2.Qxc1#
- 1...Bf1
- 2.Bd5#
- 2.Qxf1#
- 1...Be2
- 2.Bd5#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...f6
- 2.Se6#
- 1...c1S+
- 1.Bg1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- B(b);N_GUARD::R(F)+B(G)
- B(b);N_GUARD,P_PINP(D),XQ(E)::R(F)+B(G)
- S(e);N_GUARD::S(I)
- S(e);N_GUARD,XQ(E)::S(I)
- S(e);N_GUARD::S(I),XS(e)
- P(a);OGATE::QAB(E),XQ(a)
- P(a);CHECK,OGATE::QAB(E),XS(a)
- P(a);OGATE::QAB(E),XB(a)
- P(a);OGATE::QAB(E),XR(a)
- P(d);OGATEB,P_SPINP(d),XB(G)::QAR(E),XP(f)
- P(f);N_GUARD::S(I)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- P(a);CHECK,OGATE::QAB(E),XQ(a)
- P(a);CHECK,OGATE::QAB(E),XR(a)
- B(b);N_GUARD,XQ(E)::R(F)+B(G)
- S(e);N_GUARD,XQ(E)::S(I)
- P(d);OGATEB,P_SPINP(d),XB(G)::QAR(E),XP(f)
- P(a);OGATE::QAB(E),XS(a)
- P(a);OGATE::QAB(E),XB(a)
- B(b);N_GUARD::R(F)+B(G)
- S(e);N_GUARD::S(I)
- S(e);N_GUARD::S(I),XS(e)
- P(f);N_GUARD::S(I)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- R(C);
- Vars
- P(a);CHECK,OGATE::QAB(E),XS(a)
- S(e);N_GUARD,XQ(E)::S(I)
- P(d);OGATEB,P_SPINP(d),XB(G)::QAR(E),XP(f)
- P(a);OGATE::QAB(E),XQ(a)
- P(a);OGATE::QAB(E),XB(a)
- P(a);OGATE::QAB(E),XR(a)
- S(e);N_GUARD::S(I)
- S(e);N_GUARD::S(I),XS(e)
- P(f);N_GUARD::S(I)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- R(C);
- Threat
- R(F)+B(G),XB(b)
- Vars
- P(a);CHECK,OGATE::QAB(E),XS(a)
- P(d);OGATEB,P_SPINP(d),XB(G)::QAR(E),XP(f)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- R(C);
- Vars
- P(a);CHECK,OGATE::QAB(E),XS(a)
- S(e);N_GUARD,XQ(E)::S(I)
- P(d);OGATEB,P_SPINP(d),XB(G)::QAR(E),XP(f)
- P(a);OGATE::QAB(E),XQ(a)
- P(a);OGATE::QAB(E),XB(a)
- P(a);OGATE::QAB(E),XR(a)
- S(e);N_GUARD::S(I)
- S(e);N_GUARD::S(I),XS(e)
- P(f);N_GUARD::S(I)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- R(C);
- Vars
- P(a);CHECK,OGATE::QAB(E),XS(a)
- S(e);N_GUARD,XQ(E)::S(I)
- P(d);OGATEB,P_SPINP(d),XB(G)::QAR(E),XP(f)
- P(a);OGATE::QAB(E),XQ(a)
- P(a);OGATE::QAB(E),XB(a)
- P(a);OGATE::QAB(E),XR(a)
- S(e);N_GUARD::S(I)
- S(e);N_GUARD::S(I),XS(e)
- P(f);N_GUARD::S(I)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- Q(E);XB(b)
- Threat
- DUALS(8)
- Vars
- P(d);OGATE,P_SPINP(d),XB(G)::QAR1(E),XP(d)
- Refutation
- P(a);CHECK
- Try
- Q(E);
- Threat
- QAB(E)
- Vars
- P(a);CHECK,OGATE::QAB(E),XS(a)
- P(a);OGATE::QAB(E),XQ(a)
- P(a);OGATE::QAB(E),XB(a)
- S(e);N_GUARD::S(I)
- S(e);N_GUARD::S(I),XS(e)
- Refutation
- P(d);P_SPINP(d),XB(G)
- Try
- Actual
- B(B);
- Vars
- P(a);CHECK,OGATE::QAB(E),XS(a)
- B(b);N_GUARD,P_PINP(D),XQ(E)::R(F)+B(G)
- B(b);OGATE,P_SPINB(b),XB(G)::QAR(E)
- S(e);N_GUARD,XQ(E)::S(I)
- P(d);OGATEB,P_SPINP(d),XB(G)::QAR(E),XP(f)
- P(a);OGATE::QAB(E),XQ(a)
- P(a);OGATE::QAB(E),XB(a)
- P(a);OGATE::QAB(E),XR(a)
- B(b);N_GUARD::R(F)+B(G)
- S(e);N_GUARD::S(I)
- S(e);N_GUARD::S(I),XS(e)
- P(f);N_GUARD::S(I)
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).