MESON Chess Problem Database
Problem Display
PID: 71771 (2r1nN2/1P6/4n2r/NpbB1Qp1/3k3q/3p1P2/3P4/K1Rb4 w - - 0 1)
Levman, Semyon Semyonovich
Source?, 1939-1940
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Qf2
- 2.Qe4#
- 1...Qg3
- 2.Qe4#
- 1...Qh1
- 2.Qe4#
- 1...Qh2
- 2.Qe4#
- 1...Qh3
- 2.Qe4#
- 1...Qe4
- 2.Qxe4#
- 1...Qh5
- 2.Qe4#
- 1...Rh5
- 2.Sxe6#
- 1...Rh7
- 2.Sxe6#
- 1...Rh8
- 2.Sxe6#
- 1...Rc6
- 2.Sxc6#
- 1...Rb8
- 2.Sc6#
- 1...Rd8
- 2.Sc6#
- 1...Be2
- 2.Sb3#
- 1...Bb3
- 2.Sxb3#
- 1...Bxf3
- 2.Sb3#
- 1...Sf4
- 2.Qe4#
- 1...Sf6
- 2.Sxe6#
- 1...Sc7
- 2.Sc6#
- 1...b4
- 2.Rc4#
- 1...g4
- 2.Qe4#
- 1...Qf2
- Tries
- 1.Bb3?
- threat
- 2.Qd5#
- 1...Bxb3
- 2.Sxb3#
- 1...Qe4
- 2.Qxe4#
- 1...Rd8
- 2.Sc6#
- 1...Sf4
- 2.Qe4#
- 1...S6c7
- 2.Qxc5#
- 1...Sf6
- 2.Sxe6#
- 1...S8c7
- 2.Sc6#
- 1...Bxf3!
- threat
- 1.Bc4?
- threat
- 2.Qd5#
- 1...Bxf3
- 2.Sb3#
- 1...bxc4
- 2.Rxc4#
- 1...Qe4
- 2.Qxe4#
- 1...Rd8
- 2.Sc6#
- 1...Sf4
- 2.Qe4#
- 1...Sf6
- 2.Sxe6#
- 1...S8c7
- 2.Sc6#
- 1...S6c7!
- threat
- 1.Be4?
- threat
- 2.Qd5#
- 1...Qxe4
- 2.Qxe4#
- 1...Rd8
- 2.Sc6#
- 1...Bb3
- 2.Sxb3#
- 1...S6c7
- 2.Qxc5#
- 1...Sf6
- 2.Sxe6#
- 1...S8c7
- 2.Sc6#
- 1...Sf4!
- threat
- 1.Bxe6?
- threat
- 2.Qd5#
- 1...Rxe6
- 2.Sxe6#
- 1...Bxf3
- 2.Sb3#
- 1...Qe4
- 2.Qxe4#
- 1...Rd8
- 2.Sc6#
- 2.Qxc5#
- 1...Bb3
- 2.Sxb3#
- 1...Sc7
- 2.Sc6#
- 2.Qxc5#
- 1...Sf6!
- threat
- 1.bxc8Q?
- threat
- 2.Sc6#
- 1...Sxf8
- 2.Qxc5#
- 1...Sf4
- 2.Qe4#
- 2.Qxc5#
- 1...S6g7
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...S6c7!
- threat
- 1.Bb3?
- Keys
- 1.Ba2!
- threat
- 2.Qd5#
- 1...Bxf3
- 2.Sb3#
- 1...Qe4
- 2.Qxe4#
- 1...Rd8
- 2.Sc6#
- 1...Bb3
- 2.Sxb3#
- 1...Sf4
- 2.Qe4#
- 1...S6c7
- 2.Qxc5#
- 1...Sf6
- 2.Sxe6#
- 1...S8c7
- 2.Sc6#
- threat
- 1.Ba2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 14
- Sets
- Q(d);N_GUARD::QAR1(G)
- Q(d);N_GUARD::QAR1(G),XQ(d)
- R(i);N_GUARD::S(I),XS(h)
- R(j);N_GUARD::S(E),XR(j)
- R(j);N_GUARD::S(E)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(E),XB(a)
- B(a);N_GUARD,XP(D)::S(E)
- S(h);S_CUTQ(d)::QAR1(G)
- S(k);S_CUTR(i)::S(I),XS(h)
- S(k);S_CUTR(j)::S(E)
- P(e);N_GUARD::R1(B)
- P(g);S_CUTQ(d)::QAR1(G)
- Tries
- Try
- B(F);
- Threat
- QAR1(G)
- Vars
- B(a);XB(F)::S(E),XB(a)
- Q(d);N_GUARD::QAR1(G),XQ(d)
- R(j);N_GUARD::S(E)
- S(h);S_CUTQ(d)::QAR1(G)
- S(h);N_GUARD,S_CUTR(j)::QAB1(G),XB(f)
- S(k);S_CUTR(i)::S(I),XS(h)
- S(k);S_CUTR(j)::S(E)
- Refutation
- B(a);XP(D)
- Try
- B(F);
- Threat
- QAR1(G)
- Vars
- B(a);N_GUARD,XP(D)::S(E)
- P(e);OGATE,XB(F)::R1(B),XP(e)
- Q(d);N_GUARD::QAR1(G),XQ(d)
- R(j);N_GUARD::S(E)
- S(h);S_CUTQ(d)::QAR1(G)
- S(k);S_CUTR(i)::S(I),XS(h)
- S(k);S_CUTR(j)::S(E)
- Refutation
- S(h);
- Try
- B(F);
- Threat
- QAR1(G)
- Vars
- Q(d);OGATE,XB(F)::QAR1(G),XQ(d)
- R(j);N_GUARD::S(E)
- B(a);N_GUARD::S(E),XB(a)
- S(h);N_GUARD,S_CUTR(j)::QAB1(G),XB(f)
- S(k);S_CUTR(i)::S(I),XS(h)
- S(k);S_CUTR(j)::S(E)
- Refutation
- S(h);
- Try
- B(F);XS(h)
- Threat
- QAR1(G)
- Vars
- R(i);XB(F)::S(I),XR(i)
- B(a);N_GUARD,XP(D)::S(E)
- Q(d);N_GUARD::QAR1(G),XQ(d)
- B(a);N_GUARD::S(E),XB(a)
- Refutation
- S(k);
- Try
- P(H);XR(j)
- Threat
- S(E)
- Vars
- S(h);N_GUARD,XS(I)::QAB1(H),XB(f)
- S(h);N_GUARD::QAB1(H),XB(f)
- Refutation
- S(h);
- Try
- Actual
- B(F);
- Threat
- QAR1(G)
- Vars
- B(a);N_GUARD,XP(D)::S(E)
- Q(d);N_GUARD::QAR1(G),XQ(d)
- R(j);N_GUARD::S(E)
- B(a);N_GUARD::S(E),XB(a)
- S(h);S_CUTQ(d)::QAR1(G)
- S(h);N_GUARD,S_CUTR(j)::QAB1(G),XB(f)
- S(k);S_CUTR(i)::S(I),XS(h)
- S(k);S_CUTR(j)::S(E)
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).