MESON Chess Problem Database
Problem Display
PID: 35912 (2n2Kb1/p6P/3pN2R/QP1kP2R/N1p5/3B4/2P4b/1q1n4 w - - 0 1)
Levman, Semyon Semyonovich
Recomm., BCF 001. Ty., 1929-1930
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxb5
- 2.Qxb5#
- 1...Sb2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Se3
- 2.Sc3#
- 1...Qxb5
- Tries
- 1.Sb6+?
- 1...axb6
- 2.Qa8#
- 1...Sxb6!
- 1...axb6
- 1.Qc3?
- threat
- 2.Sc7#
- 2.Qd4#
- 2.Qxc4#
- 1...Qxc2
- 2.Sc7#
- 2.Qd4#
- 1...Bxe6
- 2.Qxc4#
- 1...Sxc3
- 2.Sxc3#
- 1...cxd3
- 2.Qd4#
- 2.Qxd3#
- 2.Qc6#
- 1...dxe5
- 2.Sc7#
- 2.Qd4#
- 1...Qa2
- 2.Sc7#
- 2.Qd4#
- 1...Qa1
- 2.Sc7#
- 2.Qxc4#
- 1...Qb2
- 2.Sc7#
- 2.Qxc4#
- 1...Qb3
- 2.Sc7#
- 2.Qd4#
- 1...Qb4
- 2.Sc7#
- 2.Qd4#
- 1...Bg1
- 2.Sf4#
- 2.Sc7#
- 2.Qxc4#
- 1...Sb2
- 2.Sc7#
- 2.Qd4#
- 1...Se3
- 2.Sc7#
- 2.Qd4#
- 1...Sb6
- 2.Sc7#
- 2.Qd4#
- 1...Qxb5!
- threat
- 1.Qc7?
- threat
- 2.Qxc4#
- 2.Qc6#
- 2.Qb7#
- 1...Qxc2
- 2.Qc6#
- 2.Qb7#
- 1...Bxe6
- 2.Qxc4#
- 1...cxd3
- 2.Qc6#
- 1...dxe5
- 2.Qc5#
- 2.Qc6#
- 1...Qa2
- 2.Qc6#
- 2.Qb7#
- 1...Qb3
- 2.Qc6#
- 2.Qb7#
- 1...Qb4
- 2.Qc6#
- 2.Qb7#
- 1...Sb2
- 2.Sc3#
- 2.Qc6#
- 2.Qb7#
- 1...Se3
- 2.Sc3#
- 2.Qc6#
- 2.Qb7#
- 1...Sb6
- 2.Qxd6#
- 2.Qc6#
- 2.Qb7#
- 1...Se7
- 2.Qxd6#
- 2.Qxc4#
- 1...c3
- 2.Qc4#
- 2.Qc6#
- 2.Qb7#
- 1...Qxb5!
- threat
- 1.Qa6?
- threat
- 2.Qb7#
- 2.Qc6#
- 1...Qxb5
- 2.Qxb5#
- 1...cxd3
- 2.Qc6#
- 1...dxe5
- 2.Qc6#
- 1...Sb6
- 2.Qb7#
- 1...Se7
- 2.Qxd6#
- 1...Bxe6!
- threat
- 1.b6+?
- 1...Qb5
- 2.Qxb5#
- 1...Kc6!
- 1...Qb5
- 1.exd6+?
- 1...Kxd6
- 2.Qc7#
- 2.Qd8#
- 1...Be5!
- 1...Kxd6
- 1.Sb6+?
- Keys
- 1.Qd2!
- threat
- 2.Qg2#
- 1...Qxc2
- 2.Bxc2#
- 1...Bxe6
- 2.Bg6#
- 1...Bxh7
- 2.Bxh7#
- 1...cxd3
- 2.Qxd3#
- 1...dxe5
- 2.Bf5#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Se3
- 2.Sc3#
- threat
- 1.Qd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 2
- Sets
- Q(a);OGATE,P_SPINQ(a),XP(E)::QAR2(D),XQ(a)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- Tries
- Try
- S(C);CHECK
- Vars
- P(g);OGATE,XS(C)::QAB(D)
- Refutation
- S(h);XS(C)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- B(i);XS(H)::QAB1(D),XP(d)
- S(b);XQ(D)::S(C),XS(b)
- Refutation
- Q(a);XP(E)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- B(i);XS(H)::QAB1(D),XP(d)
- P(d);XB(B)::QAB1(D)
- Refutation
- Q(a);XP(E)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- Q(a);OGATE,XP(E)::QAR2(D),XQ(a)
- P(d);XB(B)::QAB1(D)
- P(f);P_SPINP(f),XP(F)::QAB1(D)
- S(h);::QAB(D)
- S(h);N_GUARD::QAR1(D),XP(f)
- Refutation
- B(i);XS(H)
- Try
- P(E);CHECK
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::QAR2(D),XQ(a)
- Refutation
- K(e);S_FLIGHT
- Try
- P(F);CHECK,XP(f)
- Refutation
- B(c);P_SPINB(c)
- Try
- Actual
- Q(D);
- Threat
- QAB(D)
- Vars
- Q(a);OGATE,XP(A)::QAR(D)+B(B),XQ(a)
- B(i);SBLOCK,XS(H)::QAR(D)+B(B)
- B(i);OGATE,XP(J)::QAR(D)+B(B),XB(i)
- P(d);OGATE,P_SPINP(d),XB(B)::QAR2(D),XP(d)
- P(f);P_SPINP(f),SBLOCK,XP(F)::QAR(D)+B(B)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(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).