MESON Chess Problem Database
Problem Display
PID: 101051 (6K1/2Np2P1/3Pp3/p3p3/P3k1P1/2r5/2P1NPP1/1Q6 w - - 0 1)
Kovacs, Norbert
Good Companions, 1924
#2
11 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Qxc2#
- 1...Ra3
- 2.Qb7#
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Re3
- 2.Qb7#
- 1...Rf3
- 2.Qb7#
- 1...Rg3
- 2.Qb7#
- 1...Rh3
- 2.Qb7#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rc6
- 2.c3#
- 2.c4#
- 1...Rxc7
- 2.c4#
- 1...Rxc2
- Tries
- 1.Kf7?
- 1...Rxc2
- 2.Qxc2#
- 1...Rxc7
- 2.c4#
- 1...Ra3
- 2.Qb7#
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Re3
- 2.Qb7#
- 1...Rg3
- 2.Qb7#
- 1...Rh3
- 2.Qb7#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rc6
- 2.c3#
- 2.c4#
- 1...Rf3+!
- 1...Rxc2
- 1.Kh7?
- 1...Rxc2
- 2.Qxc2#
- 1...Rxc7
- 2.c4#
- 1...Ra3
- 2.Qb7#
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Re3
- 2.Qb7#
- 1...Rf3
- 2.Qb7#
- 1...Rg3
- 2.Qb7#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rc6
- 2.c3#
- 2.c4#
- 1...Rh3+!
- 1...Rxc2
- 1.Kf8?
- 1...Rxc2
- 2.Qxc2#
- 1...Rxc7
- 2.c4#
- 1...Ra3
- 2.Qb7#
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Re3
- 2.Qb7#
- 1...Rg3
- 2.Qb7#
- 1...Rh3
- 2.Qb7#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rc6
- 2.c3#
- 2.c4#
- 1...Rf3+!
- 1...Rxc2
- 1.Kh8?
- 1...Rxc2
- 2.Qxc2#
- 1...Rxc7
- 2.c4#
- 1...Ra3
- 2.Qb7#
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Re3
- 2.Qb7#
- 1...Rf3
- 2.Qb7#
- 1...Rg3
- 2.Qb7#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rc6
- 2.c3#
- 2.c4#
- 1...Rh3+!
- 1...Rxc2
- 1.Qb3?
- 1...Rxc2
- 2.Qxc2#
- 2.Qe3#
- 2.Qf3#
- 2.f3#
- 1...Rxc7
- 2.Qd3#
- 2.Qf3#
- 2.f3#
- 1...Rd3
- 2.Qxd3#
- 2.cxd3#
- 1...Re3
- 2.Qc4#
- 2.Qxe3#
- 2.Qb7#
- 1...Rf3
- 2.Qc4#
- 2.Qxf3#
- 2.Qb7#
- 2.gxf3#
- 1...Rg3
- 2.Qc4#
- 2.Qb7#
- 1...Rh3
- 2.Qc4#
- 2.Qb7#
- 1...Rc4
- 2.Qxc4#
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 2.f3#
- 1...Rc5
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 2.f3#
- 1...Rc6
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 2.f3#
- 1...Rxb3!
- 1...Rxc2
- 1.Qb4+?
- 1...Rc4
- 2.Qxc4#
- 1...axb4!
- 1...Rc4
- 1.Qb5?
- 1...Rxc7
- 2.Qd3#
- 1...Rb3
- 2.Qc4#
- 1...Ra3
- 2.Qc4#
- 2.Qb7#
- 1...Rd3
- 2.Qxd3#
- 2.cxd3#
- 1...Re3
- 2.Qc4#
- 2.Qb7#
- 1...Rf3
- 2.Qc4#
- 2.Qb7#
- 1...Rg3
- 2.Qc4#
- 2.Qb7#
- 1...Rh3
- 2.Qc4#
- 2.Qb7#
- 1...Rc4
- 2.Qxc4#
- 1...Rc5
- 2.Qd3#
- 1...Rc6
- 2.Qd3#
- 1...Rxc2!
- 1...Rxc7
- 1.Kf7?
- Keys
- 1.Qh1!
- threat
- 2.Qh7#
- 1...Rxc7
- 2.g3#
- 1...Rf3
- 2.gxf3#
- 1...Rh3
- 2.gxh3#
- threat
- 1.Qh1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 6
- Sets
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- R(a);N_GUARD::QAB(A)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE,XS(I)::QAB(A)+P(B)
- Tries
- Try
- K(K);S_FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XS(I)::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- R(a);N_GUARD::QAB(A)
- R(a);OGATE::QAB(A)+P(B)
- Refutation
- R(a);CHECK
- Try
- K(K);S_FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XS(I)::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- R(a);N_GUARD::QAB(A)
- R(a);OGATE::QAB(A)+P(B)
- Refutation
- R(a);CHECK
- Try
- K(K);P-FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XS(I)::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- R(a);N_GUARD::QAB(A)
- R(a);OGATE::QAB(A)+P(B)
- Refutation
- R(a);CHECK
- Try
- K(K);P-FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XS(I)::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- R(a);N_GUARD::QAB(A)
- R(a);OGATE::QAB(A)+P(B)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Refutation
- R(a);XQ(A)
- Try
- Q(A);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAR2(A),XR(a)
- Refutation
- P(c);XQ(A)
- Try
- Q(A);
- Vars
- R(a);N_GUARD,XS(I)::QAB1(A)
- R(a);N_GUARD::QAR2(A)
- R(a);N_GUARD::QAR2(A),XR(a)
- R(a);N_GUARD::QAB1(A)
- Refutation
- R(a);XP(B)
- Try
- Actual
- Q(A);
- Threat
- QAB(A)
- Vars
- R(a);N_GUARD,XS(I)::QAB(A)+P(E)
- R(a);OGATE::P(E),XR(a)
- R(a);OGATE::QAB(A)+P(E),XR(a)
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).