MESON Chess Problem Database
Problem Display
PID: 177765 (K5n1/P1B5/2k1P3/RNpN3Q/pp1p4/b1n5/2R5/2rr4 w - - 0 1)
Fedyakov, Sergey
3rd Prize, Sahs (Latvia), 1987
#2
9 + 10
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Sxb5
- 2.Ra6#
- 1...Sxd5
- 2.Qe8#
- 1...Sf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sxb5
- Tries
- 1.Kb8?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Rxc2
- 2.a8Q#
- 2.a8B#
- 1...Sxb5
- 2.Ra6#
- 2.a8Q#
- 2.a8B#
- 1...Sxd5
- 2.Qe8#
- 2.a8Q#
- 2.a8B#
- 1...Ra1
- 2.a8Q#
- 2.a8B#
- 1...Rb1
- 2.a8Q#
- 2.a8B#
- 1...Re1
- 2.a8Q#
- 2.a8B#
- 1...Rf1
- 2.a8Q#
- 2.a8B#
- 1...Rg1
- 2.a8Q#
- 2.a8B#
- 1...Rh1
- 2.a8Q#
- 2.a8B#
- 1...Rd2
- 2.a8Q#
- 2.a8B#
- 1...Rd3
- 2.a8Q#
- 2.a8B#
- 1...Bb2
- 2.a8Q#
- 2.a8B#
- 1...Sb1
- 2.a8Q#
- 2.a8B#
- 1...Sa2
- 2.a8Q#
- 2.a8B#
- 1...Se2
- 2.a8Q#
- 2.a8B#
- 1...Se4
- 2.a8Q#
- 2.a8B#
- 1...Sf6
- 2.Se7#
- 2.a8Q#
- 2.a8B#
- 1...Sh6
- 2.Se7#
- 2.a8Q#
- 2.a8B#
- 1...Se7
- 2.Sxe7#
- 2.a8Q#
- 2.a8B#
- 1...b3
- 2.a8Q#
- 2.a8B#
- 1...d3
- 2.a8Q#
- 2.a8B#
- 1...c4!
- threat
- 1.Sxa3?
- threat
- 2.Ra6#
- 1...Sxd5
- 2.Raxc5#
- 1...c4
- 2.Qe8#
- 1...bxa3!
- threat
- 1.Sxd4+?
- 1...cxd4
- 2.Qe8#
- 1...Rxd4!
- 1...cxd4
- 1.Sdxc3?
- threat
- 2.Ra6#
- 2.Qf3#
- 2.Qe8#
- 2.Qd5#
- 1...bxc3
- 2.Qf3#
- 1...Re1
- 2.Ra6#
- 2.Qe8#
- 2.Qd5#
- 1...Rf1
- 2.Ra6#
- 2.Qe8#
- 2.Qd5#
- 1...Rd3
- 2.Ra6#
- 2.Qe8#
- 2.Qd5#
- 1...Sf6
- 2.Ra6#
- 1...Se7
- 2.Ra6#
- 2.Qe8#
- 1...c4
- 2.Ra6#
- 2.Qd5#
- 1...dxc3!
- threat
- 1.Sxb4+?
- 1...cxb4
- 2.Ra6#
- 1...Bxb4!
- 1...cxb4
- 1.Sf4?
- threat
- 2.Qe8#
- 1...Sxb5
- 2.Qxc5#
- 1...c4
- 2.Ra6#
- 1...Sf6!
- threat
- 1.Sf6?
- threat
- 2.Qe8#
- 1...Sxb5
- 2.Qxc5#
- 1...c4
- 2.Ra6#
- 1...Sxf6!
- threat
- 1.Qe5?
- threat
- 2.Qd6#
- 1...Sxb5
- 2.Ra6#
- 1...Se4!
- threat
- 1.Kb8?
- Keys
- 1.Sd6!
- threat
- 2.Ra6#
- 1...Sxd5
- 2.Raxc5#
- 1...c4
- 2.Qe8#
- threat
- 1.Sd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- S(d);P_SPINP(h),SBLOCK,XS(C)::R(B)
- S(d);P_SPINP(h),SBLOCK,XS(D)::QAB(E)
- S(j);N_GUARD::S(D)
- S(j);N_GUARD::S(D),XS(j)
- Tries
- Try
- K(I);P-FLIGHT
- Threat
- P=Q
- Vars
- R(a);XR(A)::P=Q
- R(a);::P=Q
- R(b);::P=Q
- B(c);::P=Q
- S(d);P_SPINP(h)::P=Q
- P(f);::P=Q
- P(g);::P=Q
- Refutation
- P(h);
- Try
- S(C);XB(c)
- Threat
- R(B)
- Vars
- S(d);P_SPINP(h),XS(D)::R1(B),XP(h)
- P(h);::QAB(E)
- Refutation
- P(f);XS(C)
- Try
- S(C);CHECK,XP(g)
- Vars
- P(h);P_SPINS(d),XS(C)::QAB(E)
- Refutation
- R(b);XS(C)
- Try
- S(D);XS(d)
- Threat
- DUALS(4)
- Vars
- P(f);XS(D)::QAB(E)
- S(j);::R(B)
- Refutation
- P(g);XS(D)
- Try
- S(D);CHECK,XP(f)
- Vars
- P(h);P_SPINS(d),XS(D)::R(B)
- Refutation
- B(c);XS(D)
- Try
- S(D);
- Threat
- QAB(E)
- Vars
- S(d);P_SPINP(h),XS(C)::QAR1(E),XP(h)
- P(h);::R(B)
- Refutation
- S(j);
- Try
- S(D);
- Threat
- QAB(E)
- Vars
- S(d);P_SPINP(h),XS(C)::QAR1(E),XP(h)
- P(h);::R(B)
- Refutation
- S(j);XS(D)
- Try
- Q(E);
- Threat
- QAR1(E)
- Vars
- S(d);P_SPINP(h),SBLOCK,XS(C)::R(B)
- Refutation
- S(d);P_SPINP(h)
- Try
- Actual
- S(C);
- Threat
- R(B)
- Vars
- S(d);P_SPINP(h),XS(D)::R1(B),XP(h)
- P(h);::QAB(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).