MESON Chess Problem Database
Problem Display
PID: 42573 (1bn5/r2p2QK/1p5p/5p2/1p1Nk3/4p1P1/B3P1Pn/B4R2 w - - 0 1)
Doukhan, Gerard
1st Prize, Hjelle JT, 1976
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Rc7
- 2.Rf4#
- 1...Bf4
- 2.Rxf4#
- 1...Sf3
- 2.gxf3#
- 1...Sd6
- 2.Rf4#
- 2.Qe7#
- 1...d5
- 2.Bb1#
- 1...d6
- 2.Rf4#
- 1...Rc7
- Tries
- 1.Sc2?
- threat
- 2.Qd4#
- 1...f4
- 2.Qg6#
- 1...Be5
- 2.Qxe5#
- 1...Sf3
- 2.gxf3#
- 1...d6
- 2.Rf4#
- 1...d5!
- threat
- 1.Sf3?
- threat
- 2.Qd4#
- 1...Sxf3
- 2.gxf3#
- 1...f4
- 2.Qg6#
- 1...Be5
- 2.Qxe5#
- 1...d5
- 2.Bb1#
- 1...d6!
- threat
- 1.Sc6?
- threat
- 2.Qd4#
- 1...f4
- 2.Qg6#
- 1...Be5
- 2.Qxe5#
- 1...Sf3
- 2.gxf3#
- 1...d5
- 2.Bb1#
- 1...d6
- 2.Rf4#
- 1...dxc6!
- threat
- 1.Se6?
- threat
- 2.Qd4#
- 1...f4
- 2.Qg6#
- 1...Be5
- 2.Qxe5#
- 1...Sf3
- 2.gxf3#
- 1...d5
- 2.Bb1#
- 1...d6
- 2.Rf4#
- 1...dxe6!
- threat
- 1.Rxf5?
- threat
- 2.Bb1#
- 2.Bd5#
- 1...Ra3
- 2.Bd5#
- 1...Ra5
- 2.Bb1#
- 1...Rc7
- 2.Bd5#
- 2.Rf4#
- 2.Re5#
- 2.Qe5#
- 1...Be5
- 2.Rxe5#
- 2.Qxe5#
- 1...Se7
- 2.Bb1#
- 1...b3
- 2.Bb1#
- 1...d5
- 2.Bb1#
- 2.Bxd5#
- 1...Rxa2!
- threat
- 1.Qe7+?
- 1...Be5
- 2.Rf4#
- 1...Sxe7!
- 1...Be5
- 1.Sc2?
- Keys
- 1.Sb5!
- threat
- 2.Qd4#
- 1...f4
- 2.Qg6#
- 1...Be5
- 2.Qxe5#
- 1...Sf3
- 2.gxf3#
- 1...d5
- 2.Bb1#
- 1...d6
- 2.Rf4#
- threat
- 1.Sb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(h);S_CUTB(j)::R1(B)
- B(j);N_GUARD::R1(B),XB(j)
- S(a);OGATE::P(E),XS(a)
- P(i);P_PINQ(H),SBLOCK::B(C)
- P(i);P_PINQ(H),S_CUTB(j)::R1(B)
- Tries
- Try
- S(G);
- Threat
- QAR1(H)
- Vars
- P(e);OGATEB::QAB(H)
- B(j);N_GUARD::QAR1(H),XB(j)
- S(a);OGATE::P(E),XS(a)
- P(i);P_PINQ(H),S_CUTB(j)::R1(B)
- Refutation
- P(i);P_PINQ(H)
- Try
- S(G);
- Threat
- QAR1(H)
- Vars
- S(a);OGATE,XS(G)::P(E),XS(a)
- P(e);OGATEB::QAB(H)
- B(j);N_GUARD::QAR1(H),XB(j)
- P(i);P_PINQ(H),SBLOCK::B(C)
- Refutation
- P(i);P_PINQ(H)
- Try
- S(G);
- Threat
- QAR1(H)
- Vars
- P(e);OGATEB::QAB(H)
- B(j);N_GUARD::QAR1(H),XB(j)
- S(a);OGATE::P(E),XS(a)
- P(i);P_PINQ(H),SBLOCK::B(C)
- P(i);P_PINQ(H),S_CUTB(j)::R1(B)
- Refutation
- P(i);P_PINQ(H),XS(G)
- Try
- S(G);
- Threat
- QAR1(H)
- Vars
- P(e);OGATEB::QAB(H)
- B(j);N_GUARD::QAR1(H),XB(j)
- S(a);OGATE::P(E),XS(a)
- P(i);P_PINQ(H),SBLOCK::B(C)
- P(i);P_PINQ(H),S_CUTB(j)::R1(B)
- Refutation
- P(i);P_PINQ(H),XS(G)
- Try
- R(B);XP(e)
- Threat
- DUALS(2)
- Vars
- R(h);::B(C)
- S(k);::B(C)
- P(c);::B(C)
- Refutation
- R(h);XB(C)
- Try
- Q(H);CHECK
- Vars
- B(j);P_SPINB(j)::R1(B)
- Refutation
- S(k);XQ(H)
- Try
- Actual
- S(G);
- Threat
- QAR1(H)
- Vars
- P(e);OGATEB::QAB(H)
- B(j);N_GUARD::QAR1(H),XB(j)
- S(a);OGATE::P(E),XS(a)
- P(i);P_PINQ(H),SBLOCK::B(C)
- P(i);P_PINQ(H),S_CUTB(j)::R1(B)
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).