MESON Chess Problem Database
Problem Display
PID: 71203 (1B3q2/3P4/3p1p2/R1N1knp1/4p1Q1/4p3/4N1b1/3R2K1 w - - 0 1)
Authier, Gabriel
L'Echiquier de Paris, 1954
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Qxe4#
- 1...Bh3
- 2.Qxe4#
- 1...Sg3
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qe6#
- 1...Sd4
- 2.Sd3#
- 1...Sh4
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qe6#
- 1...Sh6
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qe6#
- 1...Se7
- 2.Sd3#
- 2.Bxd6#
- 2.Qe6#
- 1...Sg7
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 1...Bf1
- Tries
- 1.Kxg2?
- threat
- 2.Qxe4#
- 1...Sg3
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Qe6#
- 1...Sh4+!
- threat
- 1.Sf4?
- threat
- 2.Sg6#
- 2.Sb3#
- 2.Sa4#
- 2.Sa6#
- 2.Sce6#
- 2.Sb7#
- 2.Rd5#
- 1...Qxb8
- 2.Sg6#
- 2.Rd5#
- 1...Qh6
- 2.Sb3#
- 2.Sa4#
- 2.Sa6#
- 2.Sce6#
- 2.Sb7#
- 2.Rd5#
- 1...Qg7
- 2.Sb3#
- 2.Sa4#
- 2.Sa6#
- 2.Sce6#
- 2.Sb7#
- 2.Rd5#
- 1...Qf7
- 2.Sce6#
- 1...Qc8
- 2.Sg6#
- 2.Rd5#
- 1...Qd8
- 2.Sg6#
- 2.Rd5#
- 1...Qe8
- 2.Sb3#
- 2.Sa4#
- 2.Sa6#
- 2.Sce6#
- 2.Sb7#
- 2.Rd5#
- 1...Qg8
- 2.Sce6#
- 1...Bf1
- 2.Sg6#
- 2.Rd5#
- 1...Sd4
- 2.Scd3#
- 1...Sh4
- 2.Sb3#
- 2.Sa4#
- 2.Sa6#
- 2.Sce6#
- 2.Sb7#
- 2.Rd5#
- 1...Se7
- 2.Bxd6#
- 1...gxf4!
- threat
- 1.Bxd6+?
- 1...Sxd6
- 2.Sd3#
- 2.Qe6#
- 1...Qxd6!
- 1...Sxd6
- 1.Rxd6?
- threat
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 1...Qxb8
- 2.Sb7#
- 1...Qf7
- 2.Sd3#
- 2.Se6#
- 1...Qc8
- 2.Sd3#
- 1...Qd8
- 2.Sd3#
- 1...Qg8
- 2.Sd3#
- 2.Se6#
- 1...Sd4
- 2.Sd3#
- 1...Se7
- 2.Sd3#
- 2.Qe6#
- 1...Qxd6!
- threat
- 1.Qxg5?
- threat
- 2.Qf4#
- 1...Qh6
- 2.Bxd6#
- 1...fxg5!
- threat
- 1.d8S?
- threat
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Sce6#
- 2.Scb7#
- 2.Sd7#
- 2.Sc6#
- 1...Sd4
- 2.Sd3#
- 2.Sd7#
- 1...Qf7
- 2.Sd3#
- 2.Sce6#
- 2.Sd7#
- 2.Sc6#
- 2.Sxf7#
- 1...Qe8
- 2.Sd3#
- 2.Sd7#
- 1...Qg8
- 2.Sd3#
- 2.Sce6#
- 2.Sd7#
- 2.Sc6#
- 1...Se7
- 2.Sd3#
- 2.Sd7#
- 2.Bxd6#
- 2.Qe6#
- 1...Qxd8!
- threat
- 1.Kxg2?
- Keys
- 1.Sg3!
- threat
- 2.Qxf5#
- 1...Sxg3
- 2.Sb3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 1...Sd4
- 2.Sd3#
- 1...Bh3
- 2.Qxe4#
- 1...Sh4
- 2.Sb3#
- 2.Sa4#
- 2.Scxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 1...Sh6
- 2.Sb3#
- 2.Sa4#
- 2.Scxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 1...Se7
- 2.Bxd6#
- 1...Sg7
- 2.Sb3#
- 2.Sa4#
- 2.Scxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- threat
- 1.Sg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- B(a);N_GUARD::QAR1(D),XP(c)
- S(e);::R(E)+S(F),DCHECK
- Tries
- Try
- K(B);P-FLIGHT,XB(a)
- Threat
- QAR1(D),XP(c)
- Refutation
- S(e);CHECK
- Try
- S(C);
- Threat
- DUALS(7)
- Vars
- Q(i);::R(E)+S(F)
- S(e);SBLOCK::R(E)+S(F),DCHECK
- S(e);N_GUARD,S_CUTQ(i)::B(H),XP(g)
- Refutation
- P(f);XS(C)
- Try
- B(H);CHECK,XP(g)
- Refutation
- Q(i);XB(H)
- Try
- R(A);XP(g)
- Threat
- DUALS(7)
- Vars
- Q(i);XB(H)::R(E)+S(F)
- Q(i);::R(E)+S(F),DCHECK
- S(e);::R(E)+S(F),DCHECK
- Refutation
- Q(i);P_SPINQ(i),XR(A)
- Try
- Q(D);P_PINS(e),XP(f)
- Threat
- QAB1(D)
- Vars
- Q(i);N_GUARD::B(H),XP(g)
- Refutation
- P(h);N_SPINS(e),XQ(D)
- Try
- P(G);
- Threat
- DUALS(9)
- Refutation
- Q(i);XS(G)
- Try
- Actual
- S(C);
- Threat
- QAR1(D),XS(e)
- Vars
- S(e);SBLOCK::R(E)+S(F),DCHECK
- B(a);N_GUARD::QAR1(D),XP(c)
- S(e);N_GUARD,S_CUTQ(i)::B(H),XP(g)
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).