MESON Chess Problem Database
Problem Display
PID: 40018 (8/QK1pr3/3N1P2/1PR1np2/3kNn2/5r2/b2PPP1B/3R3q w - - 0 1)
Restad, Birger
6th Comm., BCF 025. Ty., 1937-1938
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 2.fxe3#
- 1...Bd5+
- 2.Rc6#
- 1...Sg2
- 2.Rxe5#
- 1...Sh3
- 2.Rxe5#
- 1...Sd5
- 2.Rc4#
- 1...Sh5
- 2.Rxe5#
- 1...Se6
- 2.Bxe5#
- 1...Sfg6
- 2.Rxe5#
- 1...Sg4
- 2.Rxf5#
- 1...Seg6
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...fxe4
- 2.Sf5#
- 1...Rc3
- Tries
- 1.Sc3?
- threat
- 2.Sxf5#
- 2.Rc4#
- 2.Rd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Rxf2+
- 2.Rd5#
- 2.Rc6#
- 1...Rd3+
- 2.Rd5#
- 2.Rc6#
- 1...Re3+
- 2.Rd5#
- 2.Rc6#
- 1...Rg3+
- 2.Rd5#
- 2.Rc6#
- 1...Rh3+
- 2.Rd5#
- 2.Rc6#
- 1...Bd5+
- 2.Rxd5#
- 2.Rc6#
- 1...Sxe2
- 2.Rd5#
- 1...Bb1
- 2.Rc4#
- 2.Rd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Bc4
- 2.Sxf5#
- 2.Rxc4#
- 2.Rd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Be6
- 2.Rc4#
- 2.Rd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sg2
- 2.Rc4#
- 2.Rd5#
- 2.Rxe5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sfd3
- 2.Rc4#
- 2.Rd5#
- 1...Sh3
- 2.Rc4#
- 2.Rd5#
- 2.Rxe5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sd5
- 2.Rc4#
- 2.Rxd5#
- 1...Sh5
- 2.Rc4#
- 2.Rd5#
- 2.Rxe5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Se6
- 2.Bxe5#
- 2.Rc4#
- 2.Rd5#
- 1...Sfg6
- 2.Rc4#
- 2.Rd5#
- 2.Rxe5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sed3
- 2.Sxf5#
- 2.Rd5#
- 1...Sc4
- 2.Sxf5#
- 2.Rd5#
- 1...Sg4
- 2.Sxf5#
- 2.Rd5#
- 2.Rxf5#
- 1...Sc6
- 2.Sxf5#
- 2.Rd5#
- 1...Seg6
- 2.Sxf5#
- 2.Rd5#
- 2.Rxf5#
- 1...Sf7
- 2.Sxf5#
- 2.Rd5#
- 2.Rxf5#
- 1...Rxc3+!
- threat
- 1.e3+?
- 1...Rxe3
- 2.dxe3#
- 1...Kd3!
- 1...Rxe3
- 1.Sc3?
- Keys
- 1.d3!
- threat
- 2.Sxf5#
- 1...Bd5+
- 2.Rc6#
- 1...Rxd3
- 2.e3#
- 1...Sxe2
- 2.Rxe5#
- 1...Sfxd3
- 2.Rxe5#
- 1...Sexd3
- 2.Rxf5#
- 1...fxe4
- 2.Sf5#
- 1...Be6
- 2.Qa1#
- 1...Sg2
- 2.Rxe5#
- 1...Sh3
- 2.Rxe5#
- 1...Sd5
- 2.Rc4#
- 1...Sh5
- 2.Rxe5#
- 1...Se6
- 2.Bxe5#
- 1...Sfg6
- 2.Rxe5#
- threat
- 1.d3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 4
- Sets
- R(c);OGATE,P_PINS(F)::R(A)+P(B)DCHECK,XR(c)
- B(b);CHECK,SBLOCK::QAB(K)+R(H)
- S(e);::QAB(K)+R(H),XS(f)
- S(e);SBLOCK::QAB(K)+R(H),DCHECK
- S(e);OGATE::B(E),XS(f)
- S(f);OGATE::QAB(K)+R(H),XP(g)
- P(g);SBLOCK,XS(F)::S(I)
- Tries
- Try
- S(F);
- Threat
- DUALS(6)
- Vars
- S(e);XP(C)::QAB(K)+R(H),DCHECK
- Refutation
- R(c);CHECK,XS(F)
- Try
- P(C);CHECK
- Vars
- R(c);OGATE,P_PINS(F),XP(C)::R(A)+P(B)DCHECK,XR(c)
- Refutation
- K(d);P-FLIGHT
- Try
- Actual
- P(B);
- Threat
- S(I),XP(g)
- Vars
- B(b);CHECK,SBLOCK::QAB(K)+R(H)
- R(c);N_GUARD,P_PINS(F),P_SPINR(c),XP(B)::P(C)
- S(e);XP(C)::QAB(K)+R(H),XS(f)
- S(e);P_SPINS(e),XP(B)::QAB(K)+R(H),XS(f)
- S(f);OGATE,P_SPINS(f),XP(B)::QAB(K)+R(H),XP(g)
- P(g);XS(F)::S(I)
- B(b);OGATE::QAB(K)
- S(e);::QAB(K)+R(H),XS(f)
- S(e);SBLOCK::QAB(K)+R(H),DCHECK
- S(e);OGATE::B(E),XS(f)
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).