MESON Chess Problem Database
Problem Display
PID: 86264 (3R4/r1R4K/BN1P4/6P1/p2k1B1n/5P2/p1Q2n2/Nq1r4 w - - 0 1)
Loshinski, Lev Ilich
11 Zapas Druzby, 1971
#2
11 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxc2+
- 2.Sxc2#
- 1...Qxa1
- 2.Qxa4#
- 2.Qxf2#
- 2.Qc4#
- 2.Qc5#
- 1...Qb2
- 2.Qxb2#
- 2.Qc4#
- 2.Qc5#
- 1...Qb3
- 2.Qc5#
- 1...Qb4
- 2.Qxf2#
- 1...Qb5
- 2.Qc3#
- 1...Qxb6
- 2.Qc4#
- 1...Rd3
- 2.Qc4#
- 2.Qc5#
- 1...Rxa6
- 2.Rc4#
- 1...Rxc7+
- 2.dxc7#
- 1...Ra8
- 2.Rc4#
- 1...Sd3
- 2.Qc3#
- 2.Qc4#
- 1...Se4
- 2.Qc4#
- 1...Sf5
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sg6
- 2.Qxf2#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Qxc2+
- Tries
- 1.Kg8?
- threat
- 2.Rc4#
- 2.Qxf2#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Qxc2
- 2.Sxc2#
- 1...Qxa1
- 2.Rc4#
- 2.Qxa4#
- 2.Qxf2#
- 2.Qc4#
- 2.Qc5#
- 1...Qxb6
- 2.Qc4#
- 1...Rxa6
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 1...Rxc7
- 2.dxc7#
- 1...Sxf3
- 2.Rc4#
- 2.Qc4#
- 1...Qc1
- 2.Rc4#
- 1...Qb2
- 2.Rc4#
- 2.Qxb2#
- 2.Qc4#
- 2.Qc5#
- 1...Qb4
- 2.Qxf2#
- 1...Qb5
- 2.Qc3#
- 1...Rc1
- 2.Rc4#
- 2.Qxf2#
- 1...Re1
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rf1
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rd2
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rd3
- 2.Rc4#
- 2.Qc4#
- 2.Qc5#
- 1...Sh1
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sd3
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 1...Sh3
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Se4
- 2.Rc4#
- 2.Qc4#
- 1...Sg4
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sg2
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sf5
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Qb3+!
- threat
- 1.Kh8?
- threat
- 2.Rc4#
- 2.Qxf2#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Qxc2
- 2.Sxc2#
- 1...Qxa1
- 2.Rc4#
- 2.Qxa4#
- 2.Qxf2#
- 2.Qc4#
- 2.Qc5#
- 1...Qxb6
- 2.Qc4#
- 1...Rxa6
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 1...Rxc7
- 2.dxc7#
- 1...Sxf3
- 2.Rc4#
- 2.Qc4#
- 1...Qc1
- 2.Rc4#
- 1...Qb2
- 2.Rc4#
- 2.Qxb2#
- 2.Qc4#
- 2.Qc5#
- 1...Qb3
- 2.Qc5#
- 1...Qb4
- 2.Qxf2#
- 1...Qb5
- 2.Qc3#
- 1...Rc1
- 2.Rc4#
- 2.Qxf2#
- 1...Re1
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rf1
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rd2
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rd3
- 2.Rc4#
- 2.Qc4#
- 2.Qc5#
- 1...Sh1
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sd3
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 1...Sh3
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Se4
- 2.Rc4#
- 2.Qc4#
- 1...Sg4
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sg2
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sf5
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sg6+!
- threat
- 1.Sb3+?
- 1...Qxb3
- 2.Qc5#
- 1...axb3!
- 1...Qxb3
- 1.g6?
- threat
- 2.Qxf2#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rxc7+
- 2.dxc7#
- 1...Qxc2
- 2.Sxc2#
- 1...Qxa1
- 2.Qxa4#
- 2.Qxf2#
- 2.Qc4#
- 2.Qc5#
- 1...Qxb6
- 2.Qc4#
- 1...Rxa6
- 2.Rc4#
- 2.Qc3#
- 2.Qc4#
- 1...Sxf3
- 2.Qc4#
- 1...Qb2
- 2.Qxb2#
- 2.Qc4#
- 2.Qc5#
- 1...Qb3
- 2.Qc5#
- 1...Qb4
- 2.Qxf2#
- 1...Qb5
- 2.Qc3#
- 1...Rc1
- 2.Qxf2#
- 1...Re1
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rf1
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rd2
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Rd3
- 2.Qc4#
- 2.Qc5#
- 1...Sh1
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sd3
- 2.Qc3#
- 2.Qc4#
- 1...Sh3
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Se4
- 2.Qc4#
- 1...Sg4
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sg2
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Sf5
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Qc1!
- threat
- 1.d7?
- threat
- 2.Rc4#
- 1...Qxc2+
- 2.Sxc2#
- 1...Qxb6
- 2.Qc4#
- 1...Qb3
- 2.Qc5#
- 1...Qb4
- 2.Qxf2#
- 1...Qb5
- 2.Qc3#
- 1...Rxc7!
- threat
- 1.Kg8?
- Keys
- 1.Rdd7!
- threat
- 2.Rc4#
- 1...Qxc2+
- 2.Sxc2#
- 1...Qxb6
- 2.Qc4#
- 1...Rxc7
- 2.dxc7#
- 1...Qb3
- 2.Qc5#
- 1...Qb4
- 2.Qxf2#
- 1...Qb5
- 2.Qc3#
- threat
- 1.Rdd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- Q(a);CHECK,XQ(B)::S(A),XQ(a)
- Q(a);N_PINQ(B)::QAB1(B)
- Q(a);N_PINQ(B)::QAB(B),XS(d)
- Q(a);N_PINQ(B),XS(G)::QAR1(B)
- R(h);N_PINR(I),XB(F)::R1(I)
- R(h);CHECK,OGATE,XR(I)::R(K)+P(H),XR(h)
- R(h);N_PINR(I)::R1(I)
- S(d);N_PINQ(B)::QAR1(B)
- Tries
- Try
- K(J);N_SPINQ(B),N_SPINR(I),S_FLIGHT
- Threat
- DUALS(5)
- Vars
- Q(a);XQ(B)::S(A),XQ(a)
- Q(a);XS(G)::QAR1(B)
- R(h);OGATE,XR(I)::R(K)+P(H),XR(h)
- Q(a);::R1(I)
- Q(a);::QAB(B),XS(d)
- Q(a);::QAB1(B)
- Refutation
- Q(a);CHECK
- Try
- K(J);N_SPINQ(B),N_SPINR(I),P-FLIGHT
- Threat
- DUALS(5)
- Vars
- Q(a);XQ(B)::S(A),XQ(a)
- Q(a);XS(G)::QAR1(B)
- R(h);OGATE,XR(I)::R(K)+P(H),XR(h)
- Q(a);::R1(I)
- Q(a);::QAB1(B)
- Q(a);::QAB(B),XS(d)
- Refutation
- S(g);CHECK
- Try
- S(A);CHECK
- Vars
- Q(a);N_PINQ(B),XS(A)::QAB1(B)
- Refutation
- P(e);XS(A)
- Try
- P(E);N_SPINQ(B)
- Threat
- DUALS(4)
- Vars
- R(h);CHECK,OGATE,XR(I)::R(K)+P(H),XR(h)
- Q(a);P_PINP(E),XQ(B)::S(A),XQ(a)
- Q(a);XS(G)::QAR1(B)
- S(g);XP(C)::QAR1(B)
- Q(a);::QAB1(B)
- Q(a);::QAB(B),XS(d)
- R(b);::QAB(B),XS(d)
- S(d);::QAR1(B)
- Refutation
- Q(a);
- Try
- P(H);N_SPINR(I)
- Threat
- R1(I)
- Vars
- Q(a);CHECK,XQ(B)::S(A),XQ(a)
- Q(a);N_PINQ(B),XS(G)::QAR1(B)
- Q(a);N_PINQ(B)::QAB1(B)
- Q(a);N_PINQ(B)::QAB(B),XS(d)
- Refutation
- R(h);P_PINP(H),XR(I)
- Try
- Actual
- R(K);N_SPINR(I)
- Threat
- R1(I)
- Vars
- Q(a);CHECK,XQ(B)::S(A),XQ(a)
- Q(a);N_PINQ(B),XS(G)::QAR1(B)
- R(h);OGATE,P_PINR(K),XR(I)::R(K)+P(H),XR(h)
- Q(a);N_PINQ(B)::QAB1(B)
- Q(a);N_PINQ(B)::QAB(B),XS(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).