MESON Chess Problem Database
Problem Display
PID: 7650 (4Q3/3p1n2/1B4B1/1pR5/3k1pp1/6r1/1P2P2R/NK2nb1q w - - 0 1)
Cheylan, Yves
Comm., Phenix, 1992
#2
9 + 10
| 56 | The Problemist | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Qe4+
- 2.Qxe4#
- 1...Qg1
- 2.Qe4#
- 1...Qxh2
- 2.Qe4#
- 1...Rg1
- 2.Sb3#
- 1...Rg2
- 2.Sb3#
- 2.Qe4#
- 1...Rb3
- 2.Sxb3#
- 1...Rc3
- 2.bxc3#
- 1...Rf3
- 2.Qe4#
- 1...Sc2
- 2.Sxc2#
- 1...Sg2
- 2.Sc2#
- 2.Qe4#
- 1...Sd3
- 2.Sc2#
- 2.Sb3#
- 1...Sf3
- 2.Sc2#
- 2.Sb3#
- 2.Qe4#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 1...Sd6
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...f3
- 2.Sb3#
- 2.Qe4#
- 2.e3#
- 1...d5
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qe4+
- Tries
- 1.Bxf7?
- threat
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rch5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qe5#
- 1...Qe4+
- 2.Rc2#
- 1...Bxe2
- 2.Rc3#
- 1...Qc6
- 2.Rc4#
- 2.Rxc6#
- 2.Qe5#
- 1...Qb7
- 2.Rc4#
- 2.Qe5#
- 1...Rc3
- 2.Rxc3#
- 2.Rc4#
- 2.Qe5#
- 2.bxc3#
- 1...Re3
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rch5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sc2
- 2.Sxc2#
- 2.Rxc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rch5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qe5#
- 1...Sd3
- 2.Sc2#
- 2.Sb3#
- 2.Rc4#
- 1...Sf3
- 2.Sc2#
- 2.Sb3#
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rch5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...b4
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Ra5#
- 2.Rb5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rch5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qe5#
- 1...d5
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...d6
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rch5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qd5!
- threat
- 1.Rhh5?
- threat
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qe4+
- 2.Rc2#
- 2.Qxe4#
- 1...Qxh5
- 2.Qe4#
- 1...Se5
- 2.Qxe5#
- 1...Qd5
- 2.Rhxd5#
- 1...Qc6
- 2.Rxc6#
- 1...Rc3
- 2.Rxc3#
- 2.bxc3#
- 1...Sc2
- 2.Sxc2#
- 2.Rxc2#
- 2.Rc3#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sd3
- 2.Sc2#
- 2.Sb3#
- 1...Sg5
- 2.Qe5#
- 1...Qb7!
- threat
- 1.Rd5+?
- 1...Kc4
- 2.Rd4#
- 1...Kxd5!
- 1...Kc4
- 1.Qe3+?
- 1...Kxe3
- 2.Rc2#
- 2.Rd5#
- 1...fxe3
- 2.Sb3#
- 1...Rxe3!
- 1...Kxe3
- 1.Qh8+?
- 1...Ke3
- 2.Rc2#
- 2.Rd5#
- 1...Se5
- 2.Qxe5#
- 1...Sxh8!
- 1...Ke3
- 1.e3+?
- 1...fxe3
- 2.Sb3#
- 1...Rxe3!
- 1...fxe3
- 1.Bxf7?
- Keys
- 1.e4!
- threat
- 2.Rc3#
- 1...Qxe4+
- 2.Qxe4#
- 1...Bd3+
- 2.Rcc2#
- 1...Kd3
- 2.Rc3#
- 1...Ke3
- 2.Rc3#
- 1...fxe4 ep
- 2.Sb3#
- 1...Rc3
- 2.Rxc3#
- 1...Bc4
- 2.Rd5#
- 1...Sd3
- 2.Sc2#
- threat
- 1.e4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 12
- Sets
- Q(c);CHECK,N_GUARD::QAR1(I),XQ(c)
- Q(c);N_GUARD::QAR1(I)
- Q(c);N_GUARD,XR(E)::QAR1(I)
- R(d);N_GUARD::S(A)
- R(d);N_GUARD,P_PINP(C)::S(A),XR(d)
- R(d);OGATE::P(C),XR(d)
- R(d);S_CUTQ(c)::QAR1(I)
- S(a);N_GUARD::S(A),XS(a)
- S(j);N_GUARD::QAB1(I),XS(j)
- S(j);N_GUARD::QAB1(I)
- Tries
- Try
- B(H);XS(j)
- Threat
- DUALS(13)
- Vars
- Q(c);CHECK::B(G)+R(F)
- B(b);XP(D)::B(G)+R(F)
- Refutation
- Q(c);
- Try
- R(E);
- Threat
- DUALS(6)
- Vars
- Q(c);N_GUARD,XR(E)::QAR1(I)
- S(j);N_GUARD::QAB1(I),XS(j)
- Q(c);N_GUARD::R1(E),XQ(c)
- Q(c);::B(G)+R(F),XQ(c)
- S(j);N_GUARD::QAB1(I)
- Refutation
- Q(c);
- Try
- R(F);CHECK
- Vars
- K(e);P-FLIGHT::R1(F)
- Refutation
- K(e);P-FLIGHT,XR(F)
- Try
- Q(I);CHECK
- Vars
- P(f);SBLOCK,XQ(I)::S(A)
- Refutation
- R(d);XQ(I)
- Try
- Q(I);CHECK
- Vars
- S(j);N_GUARD,P_SPINS(j)::QAB1(I),XS(j)
- Refutation
- S(j);XQ(I)
- Try
- P(D);CHECK
- Vars
- P(f);XP(D)::S(A)
- Refutation
- R(d);XP(D)
- Try
- Actual
- P(D);
- Threat
- B(G)+R(F)
- Vars
- Q(c);CHECK,OGATE,XP(D)::QAR1(I),XQ(c)
- B(b);CHECK,SBLOCK::B(G)+R(F)
- K(e);P-FLIGHT::R1(F)
- K(e);S_FLIGHT::B(G)+R(F),DCHECK
- P(f);EP,S_CUTR(d),XP(D)::S(A)
- R(d);::B(G)+R(F),XR(d)
- B(b);SBLOCK::B(G)+R(F),DCHECK
- S(a);N_GUARD,SBLOCK::S(A)
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).