MESON Chess Problem Database
Problem Display
PID: 42574 (B7/5R2/4p3/3N1n2/2p1r1p1/R2r1kP1/2N1p3/3nK1Q1 w - - 0 1)
Boyer, Jean-Pierre
2nd Prize, Die Schwalbe, 1981
#2
8 + 9
| 3752 | FIDE Album (1980-1982) | 1988 |
| 56 | The Problemist | 2004 |
| 136 | Problem Observer | 2006 |
SOLUTION
- SOUND
- Sets
- 1...Rf4
- 2.Sxf4#
- 1...Sb2
- 2.Qf2#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Se3
- 2.Qf2#
- 1...Rf4
- Tries
- 1.Sc3?
- threat
- 2.Bxe4#
- 1...Rxc3
- 2.Sd4#
- 1...Sxc3
- 2.Qf2#
- 1...Re3
- 2.Sd4#
- 1...Rd4
- 2.Sxd4#
- 1...Sf2
- 2.Qxf2#
- 1...Rd5!
- threat
- 1.Sdb4?
- threat
- 2.Sd4#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Se3
- 2.Qf2#
- 1...e5
- 2.Rxf5#
- 1...c3!
- threat
- 1.Sf4?
- threat
- 2.Qg2#
- 1...Sde3
- 2.Qf2#
- 1...Sh4
- 2.Sd4#
- 1...Sfe3!
- threat
- 1.Sb6?
- threat
- 2.Sd4#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Se3
- 2.Qf2#
- 1...e5
- 2.Rxf5#
- 1...c3!
- threat
- 1.Sf6?
- threat
- 2.Bxe4#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Sd6
- 2.Sd4#
- 1...Sxg3!
- threat
- 1.Sc7?
- threat
- 2.Sd4#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Se3
- 2.Qf2#
- 1...e5
- 2.Rxf5#
- 1...c3!
- threat
- 1.Se7?
- threat
- 2.Sd4#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Se3
- 2.Qf2#
- 1...e5
- 2.Rxf5#
- 1...c3!
- threat
- 1.Rxd3+?
- 1...Re3
- 2.Sc3#
- 2.Sdxe3#
- 2.Sdb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 1...Se3
- 2.Qf2#
- 1...cxd3!
- 1...Re3
- 1.Rxf5+?
- 1...Rf4
- 2.Sdb4#
- 2.Sxf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Rxf4#
- 1...exf5!
- 1...Rf4
- 1.Sc3?
- Keys
- 1.Sde3!
- threat
- 2.Qg2#
- 1...Rxe3
- 2.Sd4#
- 1...Sxe3
- 2.Qf2#
- threat
- 1.Sde3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- R(f);N_SPINS(h)::B(H)+S(F),XR(f)
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(a);N_GUARD,N_SPINR(c)::QAR1(B)
- Tries
- Try
- S(F);N_PINR(c),P_PINR(f)
- Threat
- B(H),XR(f)
- Vars
- R(c);N_GUARD,N_SPINR(f),P_SPINR(c),XS(F)::S(C)
- S(a);N_GUARD,XS(F)::QAR1(B)
- R(c);N_GUARD::S(C)
- R(c);N_GUARD::S(C),XR(c)
- S(a);N_GUARD::QAR1(B),XS(a)
- Refutation
- R(c);N_SPINR(f)
- Try
- S(F);
- Threat
- S(C)
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(a);N_GUARD,N_SPINR(c),P_SPINR(f)::QAR1(B)
- P(i);N_GUARD::R(G),XS(h)
- Refutation
- P(e);N_SPINR(c),P_SPINR(f)
- Try
- S(F);N_PINS(h)
- Threat
- QAB1(B)
- Vars
- S(a);N_GUARD,N_SPINR(c),P_SPINR(f)::QAR1(B)
- S(h);N_GUARD::S(C)
- Refutation
- S(h);N_SPINR(c),P_SPINR(f)
- Try
- S(F);
- Threat
- S(C)
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(a);N_GUARD,N_SPINR(c),P_SPINR(f)::QAR1(B)
- P(i);N_GUARD::R(G),XS(h)
- Refutation
- P(e);N_SPINR(c),P_SPINR(f)
- Try
- S(F);N_PINS(h)
- Threat
- B(H),XR(f)
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(a);N_GUARD,N_SPINR(c),P_SPINR(f)::QAR1(B)
- S(h);N_GUARD::S(C)
- Refutation
- S(h);XP(E)
- Try
- S(F);
- Threat
- S(C)
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(a);N_GUARD,N_SPINR(c),P_SPINR(f)::QAR1(B)
- P(i);N_GUARD::R(G),XS(h)
- Refutation
- P(e);N_SPINR(c),P_SPINR(f)
- Try
- S(F);
- Threat
- S(C)
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(a);N_GUARD,N_SPINR(c),P_SPINR(f)::QAR1(B)
- P(i);N_GUARD::R(G),XS(h)
- Refutation
- P(e);N_SPINR(c),P_SPINR(f)
- Try
- R(D);CHECK,XR(c)
- Vars
- S(a);N_SPINS(h),P_SPINS(a)::QAR1(B)
- Refutation
- P(e);XR(D)
- Try
- R(G);CHECK,XS(h)
- Refutation
- P(i);XR(G)
- Try
- Actual
- S(F);N_PINR(c),P_PINR(f)
- Threat
- QAB1(B)
- Vars
- R(c);N_GUARD,N_SPINR(f),P_SPINR(c),XS(F)::S(C)
- S(a);N_GUARD,XS(F)::QAR1(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).