MESON Chess Problem Database
Problem Display
PID: 276945 (b3B1q1/2p1r3/8/BRNp4/PPkn1nRr/2p2p1p/P4P1K/3Q4 w - - 0 1)
Zappas, Byron
To Mat, 1955
#2
11 + 12
| 15601 | Albrecht-Leiss-Degener Collection | 2024 |
SOLUTION
- SOUND
- Sets
- 1...Sc2
- 2.Qd3#
- 1...Sde2
- 2.Qd3#
- 1...Sb3
- 2.Qd3#
- 2.axb3#
- 1...Sxb5
- 2.Bxb5#
- 2.Qd3#
- 1...Sf5
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Sde6
- 2.Qd3#
- 1...Sfe2
- 2.Qb3#
- 2.Qd3#
- 1...Sg2
- 2.Qb3#
- 2.Qd3#
- 2.Qxd4#
- 1...Sd3
- 2.Qb3#
- 2.Qxd3#
- 1...Sh5
- 2.Qb3#
- 2.Qd3#
- 2.Qxd4#
- 1...Sfe6
- 2.Qb3#
- 2.Qf1#
- 2.Qd3#
- 1...Sg6
- 2.Qb3#
- 2.Qd3#
- 2.Qxd4#
- 1...Sc2
- Tries
- 1.Sb3?
- threat
- 2.Rc5#
- 2.Qxd4#
- 1...Sxb3
- 2.axb3#
- 1...Sxb5
- 2.Bxb5#
- 1...Qg7
- 2.Rc5#
- 1...Qh8
- 2.Rc5#
- 1...Re4
- 2.Rc5#
- 1...Sc2
- 2.Rc5#
- 1...Sde2
- 2.Rc5#
- 1...Sf5
- 2.Rc5#
- 1...Sc6
- 2.Rc5#
- 1...Sde6
- 2.Qf1#
- 1...Sfe2
- 2.Rc5#
- 1...Sfe6
- 2.Qf1#
- 1...c5
- 2.Rxc5#
- 1...Sd3!
- threat
- 1.Sa6?
- threat
- 2.Rc5#
- 1...Sxb5
- 2.Bxb5#
- 1...Sd3
- 2.Qb3#
- 1...Sb3
- 2.axb3#
- 1...Sfe6
- 2.Qf1#
- 1...c5
- 2.Rxc5#
- 1...Sde6!
- threat
- 1.Se6?
- threat
- 2.Rc5#
- 2.Qxd4#
- 1...Qxe6
- 2.Rc5#
- 1...Rxe6
- 2.Rc5#
- 1...Sxb5
- 2.Bxb5#
- 2.Qf1#
- 1...Sfxe6
- 2.Qf1#
- 1...Sd3
- 2.Qb3#
- 1...Qg7
- 2.Rc5#
- 1...Qh8
- 2.Rc5#
- 1...Sc2
- 2.Rc5#
- 2.Qf1#
- 1...Sde2
- 2.Rc5#
- 1...Sb3
- 2.Qf1#
- 2.axb3#
- 1...Sf5
- 2.Rc5#
- 2.Qf1#
- 1...Sc6
- 2.Rc5#
- 2.Qf1#
- 2.Qxd5#
- 1...Sfe2
- 2.Rc5#
- 1...c5
- 2.Rxc5#
- 1...Sdxe6!
- threat
- 1.Sd7?
- threat
- 2.Rc5#
- 1...Sd3
- 2.Qb3#
- 1...Sb3
- 2.axb3#
- 1...Sde6
- 2.Se5#
- 1...Sfe6
- 2.Se5#
- 2.Qf1#
- 1...c5
- 2.Sb6#
- 2.Rxc5#
- 1...Sxb5!
- threat
- 1.Sb3?
- Keys
- 1.Sb7!
- threat
- 2.Rc5#
- 1...Sxb5
- 2.Bxb5#
- 1...Sd3
- 2.Qb3#
- 1...Sb3
- 2.axb3#
- 1...Sde6
- 2.Qxd5#
- 1...Sfe6
- 2.Qf1#
- 1...c5
- 2.Sd6#
- 2.Rxc5#
- threat
- 1.Sb7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 4
- Sets
- S(e);P_SPINS(f)::QAB1(A)
- Tries
- Try
- S(J);
- Threat
- DUALS(2)
- Vars
- S(e);OGATE,P_SPINS(f),XS(J)::P(B),XS(e)
- S(e);OGATE,P_SPINS(f),XR(I)::B(K),XS(e)
- Q(l);::R1(I)
- R(j);::R1(I)
- S(e);P_SPINS(f)::R1(I)
- S(e);N_GUARD,P_SPINS(f),S_CUTR(j)::QAB(A)
- S(f);P_SPINS(e)::R1(I)
- S(f);N_GUARD,P_SPINS(e),S_CUTR(j)::QAB(A)
- P(i);::R1(I),XP(i)
- Refutation
- S(f);P_SPINS(e)
- Try
- S(J);
- Threat
- R1(I)
- Vars
- S(e);OGATE,P_SPINS(f),XR(I)::B(K),XS(e)
- S(f);P_SPINS(e),SBLOCK::QAB1(A)
- S(e);OGATE,P_SPINS(f)::P(B),XS(e)
- S(f);N_GUARD,P_SPINS(e),S_CUTR(j)::QAB(A)
- P(i);::R1(I),XP(i)
- Refutation
- S(e);P_SPINS(f)
- Try
- S(J);
- Threat
- DUALS(2)
- Vars
- Q(l);XS(J)::R1(I)
- R(j);XS(J)::R1(I)
- S(f);N_GUARD,P_SPINS(e),XS(J)::QAB(A)
- S(f);P_SPINS(e),SBLOCK::QAB1(A)
- Q(l);::R1(I)
- S(e);P_SPINS(f)::R1(I)
- S(f);P_SPINS(e)::R1(I)
- P(i);::R1(I),XP(i)
- Refutation
- S(e);P_SPINS(f),XS(J)
- Try
- S(J);
- Threat
- R1(I)
- Vars
- S(f);P_SPINS(e),SBLOCK::QAB1(A)
- S(e);OGATE,P_SPINS(f)::P(B),XS(e)
- S(e);P_SPINS(f),S_CUTR(j)::S(J)
- Refutation
- S(e);P_SPINS(f),XR(I)
- Try
- Actual
- S(J);
- Threat
- R1(I)
- Vars
- S(e);OGATE,P_SPINS(f),XR(I)::B(K),XS(e)
- S(f);P_SPINS(e),SBLOCK::QAB1(A)
- S(e);OGATE,P_SPINS(f)::P(B),XS(e)
- S(e);OGATE,P_SPINS(f)::QAB1(A),XP(h)
- S(f);N_GUARD,P_SPINS(e),S_CUTR(j)::QAB(A)
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).