MESON Chess Problem Database
Problem Display
PID: 22719 (bbq5/1Q1P1Ppr/nPr3N1/8/Ppk2pRn/1N1Rp3/4B3/5K2 w - - 0 1)
Likhomanov, Yuri Evstafevich
4/5 HM., The Problemist, 1995/II
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Qxd7
- 2.Qxa6#
- 1...Qc7
- 2.Qxa6#
- 1...Qd8
- 2.Qxa6#
- 1...Qe8
- 2.Qxa6#
- 1...Qf8
- 2.Qxa6#
- 1...Qg8
- 2.Qxa6#
- 1...Qh8
- 2.Qxa6#
- 1...Rc5
- 2.Rxe3#
- 1...Rxb6
- 2.Rxe3#
- 1...Rd6
- 2.Se5#
- 1...Re6
- 2.Rxe3#
- 1...Rf6
- 2.Rxe3#
- 1...Rxg6
- 2.Rxe3#
- 1...Rc7
- 2.Se5#
- 2.Rxe3#
- 2.Rxf4#
- 1...Be5
- 2.Sxe5#
- 1...Ba7
- 2.Se5#
- 2.Rxf4#
- 1...Sc5
- 2.Sa5#
- 1...Sc7
- 2.Se5#
- 2.Rxf4#
- 1...Qxd7
- Tries
- 1.Se7?
- threat
- 2.Rxe3#
- 1...Qxd7
- 2.Qxa6#
- 1...Sc5
- 2.Sa5#
- 1...Rd6!
- threat
- 1.Rg5?
- threat
- 2.Sa5#
- 2.Rxe3#
- 1...Qxd7
- 2.Sa5#
- 2.Qxa6#
- 1...Rc5
- 2.Rxe3#
- 1...Rd6
- 2.Sa5#
- 2.Se5#
- 1...Be5
- 2.Sxe5#
- 1...Sc5
- 2.Sa5#
- 1...f3
- 2.Sa5#
- 1...Sf5!
- threat
- 1.d8Q?
- threat
- 2.Rxe3#
- 2.Qd4#
- 2.Qd5#
- 1...Qxg4
- 2.Qxa6#
- 2.Qd4#
- 2.Qd5#
- 1...Qxd8
- 2.Qxa6#
- 1...Rh5
- 2.Rxe3#
- 2.Qd4#
- 1...Qf5
- 2.Qd4#
- 1...Qe6
- 2.Rxe3#
- 2.Qxa6#
- 2.Qd4#
- 1...Qd7
- 2.Qxa6#
- 1...Rc5
- 2.Rxe3#
- 2.Qd4#
- 1...Rd6
- 2.Se5#
- 1...Be5
- 2.Sxe5#
- 2.Rxe3#
- 2.Qd5#
- 1...Sf3
- 2.Rxe3#
- 2.Qd5#
- 1...Sf5
- 2.Rxe3#
- 2.Qd5#
- 1...Sc5
- 2.Sa5#
- 2.Qd4#
- 2.Qd5#
- 1...Sc7
- 2.Se5#
- 2.Rxe3#
- 2.Rxf4#
- 2.Qd4#
- 1...Bd6!
- threat
- 1.d8R?
- threat
- 2.Rxe3#
- 2.R8d4#
- 1...Qxg4
- 2.R8d4#
- 2.Qxa6#
- 1...Qxd8
- 2.Qxa6#
- 1...Qf5
- 2.R8d4#
- 1...Qd7
- 2.Qxa6#
- 1...Rd6
- 2.Se5#
- 1...Be5
- 2.Sxe5#
- 2.Rxe3#
- 1...Sf3
- 2.Rxe3#
- 1...Sf5
- 2.Rxe3#
- 1...Sc5
- 2.Sa5#
- 2.R8d4#
- 1...Bd6!
- threat
- 1.f8Q?
- threat
- 2.Sa5#
- 1...Qxf8
- 2.Qxa6#
- 1...Rc5
- 2.Rxe3#
- 1...Rd6
- 2.Se5#
- 1...Bd6
- 2.Qf7#
- 1...Rh5!
- threat
- 1.Se7?
- Keys
- 1.Sxf4!
- threat
- 2.Rxe3#
- 1...Qxd7
- 2.Qxa6#
- 1...Bxf4
- 2.Rxf4#
- 1...Rd6
- 2.Sd5#
- 1...Sc5
- 2.Sa5#
- threat
- 1.Sxf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 12
- Sets
- Q(l);N_GUARD,XP(J)::QAB(I),XS(f)
- Q(l);N_GUARD::QAB(I),XS(f)
- R(g);::B(B)+R(D),XP(a)
- R(g);XP(G)::B(B)+R(D),XP(a)
- R(g);S_CUTB(k)::S(H)
- R(g);XS(H)::B(B)+R(D),XP(a)
- B(k);N_GUARD::S(H),XB(k)
- S(f);SBLOCK::S(C)
- Tries
- Try
- S(H);
- Threat
- B(B)+R(D),XP(a)
- Vars
- Q(l);N_GUARD,XP(J)::QAB(I),XS(f)
- S(f);SBLOCK::S(C)
- Refutation
- R(g);
- Try
- R(F);N_PINP(d)
- Threat
- DUALS(2)
- Vars
- R(g);::B(B)+R(D),XP(a)
- B(k);N_GUARD::S(H),XB(k)
- S(f);::S(C)
- P(d);::S(C)
- Refutation
- S(e);
- Try
- P(J);
- Threat
- DUALS(3)
- Vars
- Q(l);N_GUARD,XQ(J)::QAB(I),XS(f)
- Q(l);::QAR1(J)
- Q(l);N_GUARD::QAB(I),XS(f)
- R(g);S_CUTB(k)::S(H)
- Refutation
- B(k);
- Try
- P(J);
- Threat
- DUALS(2)
- Vars
- Q(l);N_GUARD,XR(J)::QAB(I),XS(f)
- Q(l);::R1(J)
- Q(l);N_GUARD::QAB(I),XS(f)
- R(g);S_CUTB(k)::S(H)
- S(e);::B(B)+R(D),XP(a)
- Refutation
- B(k);
- Try
- P(K);
- Threat
- S(C)
- Vars
- Q(l);N_GUARD,XQ(K)::QAB(I),XS(f)
- R(g);::B(B)+R(D),XP(a)
- R(g);S_CUTB(k)::S(H)
- B(k);S_CUTR(g)::QAB(K)
- Refutation
- R(i);
- Try
- Actual
- S(H);XP(d)
- Threat
- B(B)+R(D),XP(a)
- Vars
- Q(l);N_GUARD,XP(J)::QAB(I),XS(f)
- B(k);OGATE,P_SPINB(k),XS(H)::R(F),XB(k)
- R(g);S_CUTB(k)::R(F)+S(H)
- S(f);SBLOCK::S(C)
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).