MESON Chess Problem Database
Problem Display
PID: 250964 (Bn3B2/8/2R5/4r1p1/3rk3/3pN2Q/1pP4K/5R1b w - - 0 1)
Lindgren, Bo Waldemar
le Grand, Johan B
Probleemblad, 1981
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Rc4#
- 1...Rb4
- 2.Rc4#
- 1...Rc4
- 2.Rxc4#
- 1...Rdd5
- 2.Rc4#
- 1...Rd6
- 2.Rc4#
- 1...Rd7
- 2.Rc4#
- 1...Rd8
- 2.Rc4#
- 1...Ra5
- 2.Re6#
- 1...Rb5
- 2.Re6#
- 1...Rc5
- 2.Re6#
- 1...Red5
- 2.Re6#
- 1...Rf5
- 2.Re6#
- 1...Re6
- 2.Rxe6#
- 2.Qxe6#
- 1...Re7
- 2.Re6#
- 1...Re8
- 2.Re6#
- 1...Bf3
- 2.Qxf3#
- 1...Ra4
- Tries
- 1.Sd1?
- threat
- 2.Sc3#
- 1...Kd5
- 2.Sc3#
- 2.Rc5#
- 1...Ra4
- 2.Rc4#
- 2.Qxd3#
- 1...Rb4
- 2.Rc4#
- 2.Qxd3#
- 1...Rc4
- 2.Rxc4#
- 2.Qxd3#
- 1...Rd6
- 2.Rc4#
- 1...Rd7
- 2.Rc4#
- 1...Rd8
- 2.Rc4#
- 1...Ra5
- 2.Re6#
- 1...Rb5
- 2.Re6#
- 1...Rc5
- 2.Re6#
- 1...Rf5
- 2.Re6#
- 2.Qxf5#
- 1...Re6
- 2.Rxe6#
- 2.Qf5#
- 2.Qxe6#
- 1...Re7
- 2.Re6#
- 2.Qf5#
- 1...Re8
- 2.Re6#
- 2.Qf5#
- 1...Bf3
- 2.Qxf3#
- 1...Rdd5
- 2.Rc4#
- 2.Qg4#
- 2.Qe3#
- 1...Red5
- 2.Re6#
- 2.Qe3#
- 1...b1S!
- threat
- 1.Sg4?
- threat
- 2.Sf6#
- 1...Kd5
- 2.Sf6#
- 1...Ra4
- 2.Rc4#
- 2.Qxd3#
- 1...Rb4
- 2.Rc4#
- 2.Qxd3#
- 1...Rc4
- 2.Rxc4#
- 2.Qxd3#
- 1...Rd6
- 2.Rc4#
- 1...Rd7
- 2.Rc4#
- 1...Rd8
- 2.Rc4#
- 1...Bf3
- 2.Qxf3#
- 1...Rdd5
- 2.Rc4#
- 2.Qe3#
- 1...Ra5
- 2.Re6#
- 1...Rb5
- 2.Re6#
- 1...Rc5
- 2.Re6#
- 1...Red5
- 2.Re6#
- 2.Qe3#
- 1...Rf5
- 2.Re6#
- 1...Re6
- 2.Rxe6#
- 1...Re7
- 2.Re6#
- 1...Re8
- 2.Re6#
- 1...Sd7!
- threat
- 1.Rc3+?
- 1...Rdd5
- 2.Rc4#
- 1...Red5
- 2.Qe6#
- 1...Sc6!
- 1...Rdd5
- 1.Rc4+?
- 1...Rd5
- 2.Qe6#
- 1...Sc6!
- 1...Rd5
- 1.Rc5+?
- 1...Rdd5
- 2.Rc4#
- 1...Red5
- 2.Qe6#
- 1...Sc6!
- 1...Rdd5
- 1.Ra6+?
- 1...Rdd5
- 2.Ra4#
- 1...Red5
- 2.Re6#
- 2.Qe6#
- 1...Sc6!
- 1...Rdd5
- 1.Rb6+?
- 1...Rdd5
- 2.Rb4#
- 1...Red5
- 2.Re6#
- 2.Qe6#
- 1...Sc6!
- 1...Rdd5
- 1.Rc7+?
- 1...Rdd5
- 2.Rc4#
- 1...Red5
- 2.Re7#
- 2.Qe6#
- 1...Sc6!
- 1...Rdd5
- 1.Rc8+?
- 1...Rdd5
- 2.Rc4#
- 1...Red5
- 2.Re8#
- 2.Qe6#
- 1...Sc6!
- 1...Rdd5
- 1.Qf5+?
- 1...Rxf5
- 2.Re6#
- 1...Kxe3!
- 1...Rxf5
- 1.Qh7+?
- 1...Rf5
- 2.Re6#
- 1...Kxe3!
- 1...Rf5
- 1.cxd3+?
- 1...Rxd3
- 2.Rc4#
- 1...Kxd3!
- 1...Rxd3
- 1.Sd1?
- Keys
- 1.Sd5!
- threat
- 2.Sc3#
- 2.Sf6#
- 1...Kxd5
- 2.Rc5#
- 1...Rdxd5
- 2.Rc4#
- 1...Rexd5
- 2.Re6#
- 1...Ra4
- 2.Qxd3#
- 1...Rb4
- 2.Qxd3#
- 1...Rc4
- 2.Rxc4#
- 2.Qxd3#
- 1...Rf5
- 2.Qxf5#
- 1...Re6
- 2.Rxe6#
- 2.Qf5#
- 2.Qxe6#
- 1...Re7
- 2.Qf5#
- 1...Re8
- 2.Qf5#
- 1...b1S
- 2.Sf6#
- 1...Bf3
- 2.Qxf3#
- 1...Sd7
- 2.Sc3#
- threat
- 1.Sd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(d);::B(G)+R(F),DCHECK
- R(d);::B(G)+R(F),DCHECK,XR(d)
- R(d);S_CUTR(f),S_CUTS(h)::R(F)
- R(f);::B(G)+R(F),DCHECK
- R(f);S_CUTR(d),S_CUTS(h)::R(F)
- B(a);N_GUARD::QAB1(E),XB(a)
- Tries
- Try
- S(D);
- Threat
- S(D)
- Vars
- R(d);::B(G)+R(F),DCHECK
- R(f);::B(G)+R(F),DCHECK
- B(a);N_GUARD::QAB1(E),XB(a)
- Refutation
- P(b);
- Try
- S(D);
- Threat
- S(D)
- Vars
- K(e);S_FLIGHT::S(D)
- R(d);::B(G)+R(F),DCHECK
- B(a);N_GUARD::QAB1(E),XB(a)
- R(f);::B(G)+R(F),DCHECK
- R(f);::B(G)+R(F),DCHECK,XR(f)
- Refutation
- S(h);
- Try
- R(F);CHECK
- Vars
- R(d);P_SPINR(d),S_CUTR(f),S_CUTS(h)::R(F)
- R(f);P_SPINR(f),S_CUTR(d),S_CUTS(h)::QAR2(E)
- Refutation
- S(h);P_SPINS(h)
- Try
- R(F);CHECK,P_PINR(d)
- Vars
- R(f);S_CUTS(h)::QAR2(E)
- Refutation
- S(h);P_SPINS(h)
- Try
- R(F);CHECK
- Vars
- R(d);P_SPINR(d),S_CUTR(f),S_CUTS(h)::R(F)
- R(f);P_SPINR(f),S_CUTR(d),S_CUTS(h)::QAR2(E)
- Refutation
- S(h);P_SPINS(h)
- Try
- R(F);CHECK
- Vars
- R(d);P_SPINR(d),S_CUTR(f),S_CUTS(h)::R(F)
- Refutation
- S(h);P_SPINS(h)
- Try
- R(F);CHECK
- Vars
- R(d);P_SPINR(d),S_CUTR(f),S_CUTS(h)::R(F)
- Refutation
- S(h);P_SPINS(h)
- Try
- R(F);CHECK
- Vars
- R(d);P_SPINR(d),S_CUTR(f),S_CUTS(h)::R(F)
- Refutation
- S(h);P_SPINS(h)
- Try
- R(F);CHECK
- Vars
- R(d);P_SPINR(d),S_CUTR(f),S_CUTS(h)::R(F)
- Refutation
- S(h);P_SPINS(h)
- Try
- Q(E);CHECK
- Vars
- R(f);XQ(E)::B(G)+R(F),DCHECK
- Refutation
- K(e);P-FLIGHT,XS(D)
- Try
- Q(E);CHECK
- Vars
- R(f);P_SPINR(f)::B(G)+R(F),DCHECK
- Refutation
- K(e);P-FLIGHT,XS(D)
- Try
- P(B);CHECK,XP(c)
- Vars
- R(d);SBLOCK,XP(B)::B(G)+R(F),DCHECK
- Refutation
- K(e);S_FLIGHT,XP(B)
- Try
- Actual
- S(D);
- Threat
- DUALS(2)
- Vars
- K(e);OGATEB,S_FLIGHT,XS(D)::B(G)+R(F),DCHECK
- R(d);OGATEB,XS(D)::R(F)
- R(f);OGATEB,XS(D)::R(F)
- R(d);N_GUARD::QAB1(E),XP(c)
- R(f);N_GUARD::QAB1(E),XR(f)
- R(f);N_GUARD::QAB1(E)
- P(b);::S(D)
- B(a);N_GUARD::QAB1(E),XB(a)
- S(h);::S(D)
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).