MESON Chess Problem Database
Problem Display
PID: 142973 (B1NR4/1n6/qp5K/1r2P3/1nkBN2R/2p5/3P4/1Q6 w - - 0 1)
Bivar, ADH
Recomm., BCF 060. Ty., 1948-1949
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Sa2
- 2.d3#
- 1...Sc6
- 2.d3#
- 1...Sa5
- 2.Sed6#
- 1...Sc5
- 2.Sed6#
- 1...Sd6
- 2.Sexd6#
- 1...Sxd8
- 2.Sed6#
- 1...cxd2
- 2.Sxd2#
- 1...Sa2
- Tries
- 1.Sed6+?
- 1...Sxd6
- 2.Sxd6#
- 1...Kd5!
- 1...Sxd6
- 1.Bg1?
- threat
- 2.Sxc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 2.Rd4#
- 1...Sxd8
- 2.Sxc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sed6#
- 2.Sf6#
- 2.Scd6#
- 1...cxd2
- 2.Rd4#
- 1...Ra5
- 2.Sxc3#
- 1...Rc5
- 2.Sxc3#
- 1...Rd5
- 2.Sed6#
- 1...Sc2
- 2.d3#
- 1...Sd3
- 2.Rd4#
- 1...Sd5
- 2.Sed6#
- 2.d3#
- 1...Sc6
- 2.d3#
- 1...Sc5
- 2.Sxc5#
- 2.Sed6#
- 2.Scd6#
- 2.Rd4#
- 1...Sd6
- 2.Sexd6#
- 2.Scxd6#
- 1...c2
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 2.Rd4#
- 1...Rxe5!
- threat
- 1.Bf2?
- threat
- 2.Sxc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 2.Rd4#
- 1...Sxd8
- 2.Sxc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sed6#
- 2.Sf6#
- 2.Scd6#
- 1...cxd2
- 2.Rd4#
- 1...Ra5
- 2.Sxc3#
- 1...Rc5
- 2.Sxc3#
- 1...Rd5
- 2.Sed6#
- 1...Sc2
- 2.d3#
- 1...Sd3
- 2.Rd4#
- 1...Sd5
- 2.Sed6#
- 2.d3#
- 1...Sc6
- 2.d3#
- 1...Sc5
- 2.Sxc5#
- 2.Sed6#
- 2.Scd6#
- 2.Rd4#
- 1...Sd6
- 2.Sexd6#
- 2.Scxd6#
- 1...c2
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 2.Rd4#
- 1...Rxe5!
- threat
- 1.Bxc3?
- threat
- 2.Rd4#
- 1...Rxe5
- 2.Qxb4#
- 1...Sxd8
- 2.Scd6#
- 1...Ra5
- 2.Qxb4#
- 1...Rc5
- 2.Qxb4#
- 1...Sc2
- 2.d3#
- 1...Sd5
- 2.d3#
- 1...Sc6
- 2.d3#
- 1...Sd6
- 2.Scxd6#
- 1...Rd5!
- threat
- 1.Be3?
- threat
- 2.Sf2#
- 2.Sxc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 2.Rd4#
- 1...Sxd8
- 2.Sf2#
- 2.Sxc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sed6#
- 2.Sf6#
- 2.Scd6#
- 1...cxd2
- 2.Rd4#
- 1...Ra5
- 2.Sxc3#
- 1...Rc5
- 2.Sxc3#
- 1...Rd5
- 2.Sed6#
- 1...Sc2
- 2.d3#
- 1...Sd3
- 2.Rd4#
- 1...Sd5
- 2.Sed6#
- 2.d3#
- 1...Sc6
- 2.d3#
- 1...Sc5
- 2.Sxc5#
- 2.Sed6#
- 2.Scd6#
- 2.Rd4#
- 1...Sd6
- 2.Sexd6#
- 2.Scxd6#
- 1...c2
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 2.Rd4#
- 1...Rxe5!
- threat
- 1.Sed6+?
- Keys
- 1.Bc5!
- threat
- 2.Rd4#
- 1...bxc5+
- 2.Sf6#
- 1...Rxc5
- 2.Sxc3#
- 1...Sxc5
- 2.Sed6#
- 1...Sxd8
- 2.Scd6#
- 1...Ra5
- 2.Qxb4#
- 1...Sc2
- 2.d3#
- 1...Sd5
- 2.d3#
- 1...Sc6
- 2.d3#
- 1...Sd6
- 2.Scxd6#
- threat
- 1.Bc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- S(b);N_GUARD::P(B)
- S(g);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD,XR(J)::S(D)
- P(a);XP(B)::S(D),XP(a)
- Tries
- Try
- S(D);CHECK
- Vars
- S(g);XS(D)::S(I),XS(g)
- Refutation
- K(c);P_SPINS(g),S_FLIGHT
- Try
- B(C);
- Threat
- DUALS(6)
- Vars
- P(a);XP(B)::R1(J)
- R(d);::R(E)+S(D),XP(a)
- R(d);SBLOCK::R(E)+S(D),DCHECK
- S(b);N_GUARD::P(B)
- S(b);::R1(J)
- Refutation
- R(d);XP(F)
- Try
- B(C);
- Threat
- DUALS(6)
- Vars
- P(a);XP(B)::R1(J)
- R(d);::R(E)+S(D),XP(a)
- R(d);SBLOCK::R(E)+S(D),DCHECK
- S(b);N_GUARD::P(B)
- S(b);::R1(J)
- Refutation
- R(d);XP(F)
- Try
- B(C);XP(a)
- Threat
- R1(J)
- Vars
- R(d);N_GUARD,XP(F)::QAR1(A),XS(b)
- S(g);N_GUARD,XR(J)::S(I)
- R(d);N_GUARD::QAR1(A),XS(b)
- S(b);N_GUARD::P(B)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- R(d);
- Try
- B(C);
- Threat
- DUALS(7)
- Vars
- P(a);XP(B)::R1(J)
- R(d);::R(E)+S(D),XP(a)
- R(d);SBLOCK::R(E)+S(D),DCHECK
- S(b);N_GUARD::P(B)
- S(b);::R1(J)
- Refutation
- R(d);XP(F)
- Try
- Actual
- B(C);
- Threat
- R1(J)
- Vars
- P(f);CHECK,SBLOCK,XB(C)::R(E)+S(D)
- R(d);SBLOCK,XB(C)::R(E)+S(D),XP(a)
- S(g);SBLOCK,XB(C)::R(E)+S(D),DCHECK
- S(g);N_GUARD,XR(J)::S(I)
- R(d);N_GUARD::QAR1(A),XS(b)
- S(b);N_GUARD::P(B)
- S(g);N_GUARD::S(I),XS(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).