MESON Chess Problem Database
Problem Display
PID: 107142 (6b1/B2NKP2/2pP1R2/3kpR1r/3pnp2/1P6/1p2N1r1/1BqQ2b1 w - - 0 1)
Keres, Paul P
Esti Maleilm, 1933
#2
11 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxb1
- 2.Sxf4#
- 1...Qxd1
- 2.Sxf4#
- 1...Qc2
- 2.Sxf4#
- 1...Qc3
- 2.Sxf4#
- 1...Qc4
- 2.Sxf4#
- 1...Qc5
- 2.Sxf4#
- 1...Rxe2
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rf2
- 2.Qxd4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rgh2
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rh1
- 2.Rxe5#
- 1...Rhh2
- 2.Rxe5#
- 1...Rh3
- 2.Rxe5#
- 1...Rh4
- 2.Rxe5#
- 1...Rh6
- 2.Rxe5#
- 1...Rh7
- 2.Rxe5#
- 1...Rh8
- 2.Rxe5#
- 1...Bh2
- 2.Qxd4#
- 1...Sd2
- 2.Sxf4#
- 1...Sf2
- 2.Qxd4#
- 1...Sg3
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Rxe5#
- 1...Sxd6
- 2.Rxd6#
- 1...Sxf6
- 2.Sxf6#
- 1...Qxb1
- Tries
- 1.Sg3?
- threat
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qxb1
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qxd1
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rxf5
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bxf7
- 2.Bxe4#
- 1...Sxg3
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sxd6
- 2.Rxd6#
- 1...Sxf6
- 2.Sxf6#
- 1...fxg3
- 2.fxg8Q#
- 2.fxg8B#
- 1...c5
- 2.Bxe4#
- 1...Qd2
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qe3
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qc2
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qc3
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qc4
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qc5
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rc2
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rd2
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Re2
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rf2
- 2.Bxe4#
- 2.Qxd4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rgh2
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rh1
- 2.Bxe4#
- 2.Rxe5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rhh2
- 2.Bxe4#
- 2.Rxe5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rh3
- 2.Bxe4#
- 2.Rxe5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rh4
- 2.Bxe4#
- 2.Rxe5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rg5
- 2.Bxe4#
- 1...Rh6
- 2.Bxe4#
- 2.Rxe5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rh7
- 2.Bxe4#
- 2.Rxe5#
- 1...Rh8
- 2.Bxe4#
- 2.Rxe5#
- 1...Bf2
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bh2
- 2.Bxe4#
- 2.Qxd4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Be3
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bh7
- 2.Bxe4#
- 1...Sd2
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sf2
- 2.Qxd4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sc3
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Rxe5#
- 1...d3
- 2.fxg8Q#
- 2.fxg8B#
- 1...f3
- 2.Bxe4#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rxg3!
- threat
- 1.Bxd4?
- threat
- 2.Sb6#
- 1...Bxd4
- 2.Qxd4#
- 1...Qc5
- 2.Sxf4#
- 1...c5!
- threat
- 1.Sg3?
- Keys
- 1.Qd3!
- threat
- 2.Qxe4#
- 1...Qxb1
- 2.Sxf4#
- 2.Qc4#
- 1...Rxe2
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sxd6
- 2.Rxd6#
- 1...Sxf6
- 2.Sxf6#
- 1...Qe3
- 2.Qc4#
- 1...Qc2
- 2.Sxf4#
- 1...Sd2
- 2.Sxf4#
- 1...Sf2
- 2.Qxd4#
- 1...Sc3
- 2.Qc4#
- 1...Sg3
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Rxe5#
- threat
- 1.Qd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- Q(a);N_GUARD,XB(A)::S(C),XP(g)
- Q(a);N_GUARD,N_SPINP(e),P_SPINP(i),XQ(B)::S(C),XP(g)
- Q(a);N_GUARD::S(C),XP(g)
- Q(a);N_GUARD,P_PINP(F)::S(C),XP(g)
- R(d);N_GUARD,XS(C)::PXB(l)=Q
- R(d);N_GUARD::PXB(l)=Q
- R(j);N_GUARD::R1(E),XP(i)
- R(j);N_GUARD,P_PINP(K)::R1(E),XP(i)
- B(b);N_GUARD::QAR1(B),XP(e)
- S(f);N_SPINP(e),P_SPINP(i),S_CUTQ(a)::S(C),XP(g)
- S(f);S_CUTB(b)::QAR1(B),XP(e)
- S(f);S_CUTR(d)::PXB(l)=Q
- S(f);SBLOCK::S(I)
- S(f);S_CUTR(j)::R1(E),XP(i)
- S(f);OGATE,XP(F)::R1(G),XS(f)
- S(f);XR(G)::S(I),XS(f)
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(a);XB(A)::PXB(l)=Q
- B(l);XP(K)::B(A),XS(f)
- S(f);XS(C)::PXB(l)=Q
- S(f);OGATE,XP(F)::R1(G),XS(f)
- S(f);XR(G)::S(I),XS(f)
- P(g);XS(C)::PXB(l)=Q
- P(k);::B(A),XS(f)
- Q(a);::PXB(l)=Q
- R(d);::PXB(l)=Q
- R(j);::B(A),XS(f)
- B(l);::B(A),XS(f)
- S(f);N_SPINP(e),P_SPINP(i)::PXB(l)=Q
- S(f);::PXB(l)=Q
- S(f);SBLOCK::S(I)
- S(f);S_CUTR(j)::R1(E),XP(i)
- P(e);::PXB(l)=Q
- Refutation
- R(d);XS(C)
- Try
- B(H);P_PINP(i),XP(e)
- Threat
- S(I)
- Vars
- B(b);OGATE,P_SPINB(b),XB(H)::QAR1(B),XB(b)
- Q(a);N_GUARD,P_PINP(F)::S(C),XP(g)
- Refutation
- P(k);
- Try
- Actual
- Q(B);
- Threat
- QAB1(B),XS(f)
- Vars
- R(d);N_GUARD,XS(C)::PXB(l)=Q
- S(f);OGATE,XP(F)::R1(G),XS(f)
- S(f);XR(G)::S(I),XS(f)
- Q(a);N_GUARD::QAB1(B)
- Q(a);N_GUARD::S(C),XP(g)
- S(f);S_CUTQ(a)::S(C),XP(g)
- S(f);S_CUTB(b)::QAR1(B),XP(e)
- S(f);S_CUTQ(a)::QAB1(B)
- S(f);S_CUTR(d)::PXB(l)=Q
- S(f);SBLOCK::S(I)
- S(f);S_CUTR(j)::R1(E),XP(i)
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).