MESON Chess Problem Database
Problem Display
PID: 264643 (8/1p2K3/1pkBPP2/bp1p4/1P1R1Np1/2NpPrp1/R4pQ1/5B2 w - - 0 1)
Tyunin, Aleksandr Dmitrevich
Zadachi i Etyudi, 2009
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...Rxe3
- Tries
- 1.Sb1?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Rc2#
- 1...Bxb4!
- 1...Rxe3
- 1.Sd1?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Rc2#
- 1...Bxb4!
- 1...Rxe3
- 1.Sce2?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...dxe2
- 2.Rc2#
- 1...d2
- 2.Rc2#
- 1...Bxb4!
- 1...Rxe3
- 1.Sxd3?
- threat
- 2.Se5#
- 1...Rxe3
- 2.Qxd5#
- 1...Rf5!
- threat
- 1.Sfxd5?
- 1...Rxe3
- 2.Sxe3#
- 1...Rxf6
- 2.Sf4#
- 2.Sxf6#
- 1...Bxb4
- 2.Sxb4#
- 1...Rf4
- 2.Sxf4#
- 1...d2
- 2.Bxb5#
- 1...Rf5!
- 1...Rxe3
- 1.Sg6?
- threat
- 2.Se5#
- 1...Rxe3
- 2.Qxd5#
- 1...Rf5!
- threat
- 1.Be5?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4+!
- 1...Rxe3
- 1.Bb8?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4+!
- 1...Rxe3
- 1.Ra1?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4!
- 1...Rxe3
- 1.Rb2?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4!
- 1...Rxe3
- 1.Rc2?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...dxc2
- 2.Bxb5#
- 1...d2
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sa4#
- 2.Se4#
- 2.Sxb5#
- 2.Scxd5#
- 2.Bxb5#
- 1...Bxb4!
- 1...Rxe3
- 1.Rd2?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...Bxb4!
- 1...Rxe3
- 1.Ra3?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4!
- 1...Rxe3
- 1.Ra4?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...bxa4
- 2.b5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4!
- 1...Rxe3
- 1.Rxa5?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...bxa5!
- 1...Rxe3
- 1.Rc4+?
- 1...bxc4
- 2.b5#
- 1...dxc4!
- 1...bxc4
- 1.Rxd5?
- 1...Rxe3
- 2.Rc5#
- 1...Rxf4
- 2.Rc5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4!
- 1...Rxe3
- 1.f7?
- 1...Rxe3
- 2.Qxd5#
- 1...Rxf4
- 2.Qxd5#
- 1...d2
- 2.Bxb5#
- 1...Bxb4!
- 1...Rxe3
- 1.Sb1?
- Keys
- 1.Scxd5!
- 1...Rxe3
- 2.Sxe3#
- 1...Rxf4
- 2.Sxf4#
- 1...Bxb4
- 2.Sxb4#
- 1...d2
- 2.Rc2#
- 1...Rxe3
- 1.Scxd5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Tries
- Try
- S(D);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);N_GUARD::R(B)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- S(D);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);N_GUARD::R(B)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- S(D);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);N_GUARD,XS(D)::R(B)
- P(b);N_GUARD::R(B)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- S(H);XP(b)
- Threat
- S(H)
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- Refutation
- R(c);P_SPINP(h)
- Try
- S(H);XP(h)
- Vars
- R(c);P_PINP(J),XP(E)::QAB(C)+S(H),XR(c)
- B(f);P_PINB(I),XP(F)::S(H),XB(f)
- R(c);::QAB(C)+S(H),XR(c)
- P(b);OGATE::B(A),XP(g)
- Refutation
- R(c);
- Try
- S(H);
- Threat
- S(H)
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- Refutation
- R(c);P_SPINP(h)
- Try
- B(I);
- Vars
- R(c);OGATE,P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);CHECK,XP(F)
- Try
- B(I);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);CHECK,XP(F)
- Try
- R(B);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- R(B);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- R(B);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE,XR(B)::B(A),XP(g)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- R(B);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- R(B);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- R(B);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(g);OGATE,XR(B)::P(F)
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- R(B);XB(f)
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Refutation
- P(i);XR(B)
- Try
- R(G);CHECK
- Vars
- P(g);OGATE,XR(G)::P(F)
- Refutation
- P(h);P_SPINR(c),XR(G)
- Try
- R(G);XP(h)
- Vars
- R(c);P_PINP(J),XP(E)::QAB(C)+R(G),DCHECK
- R(c);XS(H)::QAB(C)+R(G),DCHECK
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- P(K);
- Vars
- R(c);OGATE,P_PINP(J),P_SPINP(h),XP(E)::QAB1(C),XP(h)
- R(c);OGATE,P_SPINP(h),XS(H)::QAB1(C),XP(h)
- P(b);OGATE::B(A),XP(g)
- Refutation
- B(f);P_PINB(I),XP(F)
- Try
- Actual
- S(D);XP(h)
- Vars
- R(c);P_PINP(J),XP(E)::QAB(C)+S(D),XR(c)
- R(c);XS(H)::QAB(C)+S(D),XR(c)
- B(f);P_PINB(I),XP(F)::S(D),XB(f)
- P(b);N_GUARD::R(B)
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).