MESON Chess Problem Database
Problem Display
PID: 180476 (1n2N3/4PK1p/1pB2p2/1RPNk1PR/qpP3P1/2PP2P1/1B6/1r5r w - - 0 1)
Lider, Valentin Viktorovich
Probleemblad, 1987
#2
15 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.cxb4#
- 1...Rbd1
- 2.cxb4#
- 1...Rbe1
- 2.cxb4#
- 1...Rbf1
- 2.cxb4#
- 1...Rbg1
- 2.cxb4#
- 1...Rc1
- 2.gxf6#
- 1...Rhd1
- 2.gxf6#
- 1...Rhe1
- 2.gxf6#
- 1...Rhg1
- 2.gxf6#
- 1...bxc3
- 2.Bxc3#
- 1...fxg5
- 2.Rxg5#
- 1...Ra1
- Tries
- 1.Se3?
- threat
- 2.d4#
- 1...bxc3
- 2.Bxc3#
- 1...Qd1
- 2.cxb6#
- 1...Rbd1
- 2.cxb4#
- 1...Rhd1
- 2.gxf6#
- 1...Sxc6!
- threat
- 1.Sxb4?
- threat
- 2.d4#
- 1...Sxc6
- 2.Sxc6#
- 1...Qd1
- 2.cxb6#
- 1...Rhd1
- 2.gxf6#
- 1...Rbd1!
- threat
- 1.Sf4?
- threat
- 2.d4#
- 1...bxc3
- 2.Bxc3#
- 1...Qd1
- 2.cxb6#
- 1...Rbd1
- 2.cxb4#
- 1...Rhd1
- 2.gxf6#
- 1...Sxc6!
- threat
- 1.Sxb6?
- threat
- 2.d4#
- 1...Sxc6
- 2.Sd7#
- 1...bxc3
- 2.Bxc3#
- 1...Rbd1
- 2.cxb4#
- 1...Rhd1
- 2.gxf6#
- 1...Qd1!
- threat
- 1.Sdc7?
- threat
- 2.d4#
- 1...bxc3
- 2.Bxc3#
- 1...Qd1
- 2.cxb6#
- 1...Rbd1
- 2.cxb4#
- 1...Rhd1
- 2.gxf6#
- 1...Sxc6!
- threat
- 1.Sexf6?
- threat
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qxb5
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rxb2
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rxh5
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Sxc6
- 2.Sd7#
- 1...bxc3
- 2.Bxc3#
- 1...Qd1
- 2.e8Q#
- 2.e8R#
- 1...Qc2
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qb3
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qa1
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qa2
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qa3
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qa5
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qa6
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Qa7
- 2.d4#
- 1...Qa8
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Ra1
- 2.cxb4#
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rbc1
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rbd1
- 2.cxb4#
- 2.e8Q#
- 2.e8R#
- 1...Rbe1
- 2.cxb4#
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rbf1
- 2.cxb4#
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rbg1
- 2.cxb4#
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rhc1
- 2.d4#
- 2.g6#
- 2.e8Q#
- 2.e8R#
- 1...Rhd1
- 2.g6#
- 2.e8Q#
- 2.e8R#
- 1...Rhe1
- 2.d4#
- 2.g6#
- 2.e8Q#
- 2.e8R#
- 1...Rhf1
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rhg1
- 2.d4#
- 2.g6#
- 2.e8Q#
- 2.e8R#
- 1...Rh2
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rh3
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Rh4
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Sa6
- 2.Sd7#
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...Sd7
- 2.Sxd7#
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...b3
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...h6
- 2.d4#
- 2.e8Q#
- 2.e8R#
- 1...bxc5!
- threat
- 1.g6+?
- 1...f5
- 2.Rxf5#
- 1...Rxh5!
- 1...f5
- 1.Se3?
- Keys
- 1.Sdxf6!
- threat
- 2.d4#
- 1...Sxc6
- 2.Sd7#
- 1...bxc3
- 2.Bxc3#
- 1...Qd1
- 2.cxb6#
- 1...Rbd1
- 2.cxb4#
- 1...Rhd1
- 2.g6#
- threat
- 1.Sdxf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- R(a);N_GUARD::B(A)+P(B),XP(d)
- R(b);N_GUARD::R(K)+P(J),XP(g)
- P(d);OGATE,P_SPINP(d),XP(B)::B(A),XP(d)
- P(g);OGATE,P_SPINP(g),XP(J)::R(K),XP(g)
- Tries
- Try
- S(I);
- Threat
- P(C)
- Vars
- P(d);OGATE,P_SPINP(d),XP(B)::B(A),XP(d)
- Q(c);N_GUARD::R(G)+P(H),XP(f)
- R(a);N_GUARD::B(A)+P(B),XP(d)
- R(b);N_GUARD::R(K)+P(J),XP(g)
- Refutation
- S(i);XB(L)
- Try
- S(I);XP(d)
- Threat
- P(C)
- Vars
- S(i);XB(L)::S(I),XS(i)
- Q(c);N_GUARD::R(G)+P(H),XP(f)
- R(b);N_GUARD::R(K)+P(J),XP(g)
- Refutation
- R(a);
- Try
- S(I);
- Threat
- P(C)
- Vars
- P(d);OGATE,P_SPINP(d),XP(B)::B(A),XP(d)
- Q(c);N_GUARD::R(G)+P(H),XP(f)
- R(a);N_GUARD::B(A)+P(B),XP(d)
- R(b);N_GUARD::R(K)+P(J),XP(g)
- Refutation
- S(i);XB(L)
- Try
- S(I);XP(f)
- Threat
- P(C)
- Vars
- S(i);N_GUARD,XB(L)::S(I)
- P(d);OGATE,P_SPINP(d),XP(B)::B(A),XP(d)
- R(a);N_GUARD::B(A)+P(B),XP(d)
- R(b);N_GUARD::R(K)+P(J),XP(g)
- Refutation
- Q(c);
- Try
- S(I);
- Threat
- P(C)
- Vars
- P(d);OGATE,P_SPINP(d),XP(B)::B(A),XP(d)
- Q(c);N_GUARD::R(G)+P(H),XP(f)
- R(a);N_GUARD::B(A)+P(B),XP(d)
- R(b);N_GUARD::R(K)+P(J),XP(g)
- Refutation
- S(i);XB(L)
- Try
- S(O);XP(g)
- Threat
- DUALS(3)
- Vars
- S(i);N_GUARD,XB(L)::S(O)
- P(d);OGATE,P_SPINP(d),XP(B)::B(A),XP(d)
- Q(c);::P=Q
- Q(c);P_PINP(M)::P(C)
- Refutation
- P(f);XP(H)
- Try
- P(J);CHECK
- Vars
- P(g);P_SPINP(g)::R1(K),XP(g)
- Refutation
- R(b);XR(K)
- Try
- Actual
- S(I);XP(g)
- Threat
- P(C)
- Vars
- S(i);N_GUARD,XB(L)::S(I)
- P(d);OGATE,P_SPINP(d),XP(B)::B(A),XP(d)
- Q(c);N_GUARD::R(G)+P(H),XP(f)
- R(a);N_GUARD::B(A)+P(B),XP(d)
- R(b);N_GUARD::R(K)+P(J)
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).