MESON Chess Problem Database
Problem Display
PID: 40363 (1Brb2b1/4n3/7Q/3p4/3pkNK1/1N2P1Pp/2P4r/qBn1R3 w - - 0 1)
Kofman, Rafael Moiseevich
3rd Prize, Source?, 1950
#2
10 + 11
| 3105 | FIDE Album (1945-1955) | 1964 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Sd2#
- 1...Rhxc2
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Rcxc2
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Be6+
- 2.Qxe6#
- 1...Bh7
- 2.Qe6#
- 1...Sd3
- 2.cxd3#
- 1...Sc6
- 2.Sc5#
- 2.Qg6#
- 1...Sg6
- 2.Qxg6#
- 1...Rh1
- Tries
- 1.Se2?
- threat
- 2.Sd2#
- 2.Qf4#
- 1...Be6+
- 2.Qxe6#
- 1...Rxe2
- 2.Qf4#
- 1...Rxc2
- 2.Sc5#
- 1...Rxb8
- 2.Qf4#
- 1...Sxe2
- 2.Sd2#
- 1...Sxb3
- 2.Qf4#
- 1...dxe3
- 2.Qf4#
- 1...Rc7
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qa5
- 2.Qf4#
- 1...Rf2
- 2.Sd2#
- 1...Ba5
- 2.Qf4#
- 1...Sd3
- 2.Sd2#
- 2.cxd3#
- 1...Sg6
- 2.Sd2#
- 1...Bc7!
- threat
- 1.Sg2?
- threat
- 2.Sd2#
- 2.Qf4#
- 1...Be6+
- 2.Qxe6#
- 1...Rxg2
- 2.Qf4#
- 1...Rxc2
- 2.Sc5#
- 1...Rxb8
- 2.Qf4#
- 1...Sxb3
- 2.Qf4#
- 1...dxe3
- 2.Rxe3#
- 2.Qxe3#
- 2.Qf4#
- 1...Rc7
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qa5
- 2.Qf4#
- 1...Ba5
- 2.Qf4#
- 1...Se2
- 2.Sd2#
- 1...Sd3
- 2.Sd2#
- 2.cxd3#
- 1...Sg6
- 2.Sd2#
- 2.Qxg6#
- 1...Bc7!
- threat
- 1.Sxh3?
- threat
- 2.Sg5#
- 2.Qf4#
- 1...Be6+
- 2.Qxe6#
- 1...Rhxc2
- 2.Sf2#
- 1...Rxh3
- 2.Sd2#
- 2.Qf4#
- 1...Rcxc2
- 2.Sc5#
- 1...Rxb8
- 2.Qf4#
- 1...Rc7
- 2.Qf4#
- 1...Re2
- 2.Qf4#
- 1...Rf2
- 2.Sxf2#
- 2.Sg5#
- 1...Se2
- 2.Sd2#
- 1...Sd3
- 2.Sg5#
- 2.cxd3#
- 1...Sf5
- 2.Qf4#
- 1...Sc6
- 2.Sc5#
- 2.Qf4#
- 2.Qg6#
- 1...Sg6
- 2.Qxg6#
- 1...Bc7!
- threat
- 1.Qg6+?
- 1...Sf5
- 2.Qxf5#
- 1...Sxg6!
- 1...Sf5
- 1.Qh7+?
- 1...Sf5
- 2.Qxf5#
- 1...Sg6
- 2.Qxg6#
- 1...Bxh7!
- 1...Sf5
- 1.Se2?
- Keys
- 1.Sd3!
- threat
- 2.Qf4#
- 1...Be6+
- 2.Qxe6#
- 1...Rhxc2
- 2.Sf2#
- 1...Rcxc2
- 2.Sdc5#
- 1...Sxd3
- 2.cxd3#
- 1...Rf2
- 2.Sxf2#
- 1...Bc7
- 2.Sbc5#
- 1...Se2
- 2.Sd2#
- 1...Sg6
- 2.Qxg6#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(c);N_GUARD::S(D)
- R(c);N_GUARD,P_SPINR(c),XP(C)::S(D)
- R(c);N_GUARD::S(D),XR(c)
- R(i);N_GUARD,P_SPINR(i),XP(C)::S(D)
- R(i);N_GUARD::S(D),XR(i)
- B(k);CHECK,N_GUARD::QAR2(I),XB(k)
- B(k);N_GUARD::QAR2(I)
- S(b);OGATE::P(C),XS(b)
- S(h);N_GUARD::QAB(I),XS(h)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(k);CHECK,N_GUARD::QAR2(I),XB(k)
- R(c);XS(G)::QAR1(I)
- R(i);N_GUARD,P_SPINR(i),XP(C)::S(D)
- R(i);XB(J)::QAR1(I)
- S(b);XS(G)::S(D)
- S(b);XS(D)::QAR1(I)
- P(e);XP(E)::QAR1(I)
- R(i);::QAR1(I)
- Q(a);::QAR1(I)
- R(c);::S(D)
- B(j);::QAR1(I)
- S(h);::S(D)
- Refutation
- B(j);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(k);CHECK,N_GUARD::QAR2(I),XB(k)
- R(c);P_PINP(F),XS(G)::QAR1(I)
- R(i);N_GUARD,P_SPINR(i),XP(C)::S(D)
- R(i);XB(J)::QAR1(I)
- S(b);XS(D)::QAR1(I)
- R(i);::QAR1(I)
- Q(a);::QAR1(I)
- B(j);::QAR1(I)
- S(b);::S(D)
- Refutation
- B(j);
- Try
- S(G);XP(d)
- Threat
- DUALS(2)
- Vars
- B(k);CHECK,N_GUARD::QAR2(I),XB(k)
- R(c);N_GUARD,P_SPINR(c),XP(C)::S(G)
- R(i);N_GUARD,P_SPINR(i),XP(C)::S(D)
- R(i);XB(J)::QAR1(I)
- R(i);::QAR1(I)
- R(c);::QAR1(I)
- S(b);S_CUTR(c)::S(D)
- S(h);::QAR1(I)
- S(h);N_GUARD::QAB(I),XS(h)
- Refutation
- B(j);
- Try
- Q(I);CHECK
- Vars
- S(h);N_GUARD,P_SPINS(h)::QAB1(I),XS(h)
- Refutation
- S(h);XQ(I)
- Try
- Q(I);CHECK
- Vars
- S(h);N_GUARD,P_SPINS(h)::QAB1(I),XS(h)
- S(h);N_GUARD,P_SPINS(h)::QAB(I),XS(h)
- Refutation
- B(k);XQ(I)
- Try
- Actual
- S(G);
- Threat
- QAR1(I)
- Vars
- B(k);CHECK,N_GUARD::QAR2(I),XB(k)
- R(c);N_GUARD,XP(C)::S(G)
- R(i);N_GUARD,XP(C)::S(G)
- S(b);OGATE,XS(G)::P(C),XS(b)
- R(c);N_GUARD::S(G),XR(c)
- B(j);S_CUTR(i)::S(D)
- S(b);S_CUTR(c)::S(D)
- S(h);N_GUARD::QAB(I),XS(h)
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).