MESON Chess Problem Database
Problem Display
PID: 277096 (6B1/8/KR1P4/p1k1bn2/2rp3q/1n2B2Q/1R2NN2/3r4 w - - 0 1)
Zappas, Byron
To Mat, 1953
#2
9 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2024 |
SOLUTION
- SOUND
- Sets
- 1...Qg3
- 2.Se4#
- 1...Qg5
- 2.Se4#
- 1...Qf6
- 2.Se4#
- 1...Qe7
- 2.Se4#
- 1...Qd8
- 2.Se4#
- 1...Qxh3
- 2.Se4#
- 1...Qe4
- 2.Sxe4#
- 1...Qh5
- 2.Se4#
- 1...Qh6
- 2.Se4#
- 1...Qh7
- 2.Se4#
- 1...Qh8
- 2.Se4#
- 1...Ra1
- 2.Sd3#
- 1...Rb1
- 2.Sd3#
- 1...Rdc1
- 2.Sd3#
- 1...Re1
- 2.Sd3#
- 1...Rf1
- 2.Sd3#
- 1...Rg1
- 2.Sd3#
- 1...Rh1
- 2.Sd3#
- 1...Rd3
- 2.Sxd3#
- 1...Rc2
- 2.Rxc2#
- 1...Bf4
- 2.Se4#
- 1...Sa1
- 2.R2b5#
- 1...Sc1
- 2.R2b5#
- 1...Sd2
- 2.Sd3#
- 2.R2b5#
- 1...Sxe3
- 2.Qc8#
- 1...Sg3
- 2.Qc8#
- 1...Sh6
- 2.Qc8#
- 1...Sg7
- 2.Qc8#
- 1...Qg3
- Tries
- 1.Qg2?
- threat
- 2.Qd5#
- 2.Qc6#
- 1...Sxe3
- 2.Qc6#
- 1...dxe3
- 2.Qc6#
- 1...Qh1
- 2.Se4#
- 1...Qe4
- 2.Sxe4#
- 1...Se7!
- threat
- 1.Qxf5?
- threat
- 2.Qc8#
- 2.Qxe5#
- 1...dxe3
- 2.Qc8#
- 1...Qg3
- 2.Se4#
- 2.Qc8#
- 1...Qg5
- 2.Se4#
- 2.Qc8#
- 1...Qf6
- 2.Se4#
- 2.Qc8#
- 1...Qe7
- 2.Se4#
- 1...Qd8
- 2.Se4#
- 2.Qxe5#
- 1...Qh2
- 2.Se4#
- 2.Qc8#
- 1...Qh3
- 2.Se4#
- 2.Qxe5#
- 1...Qe4
- 2.Sxe4#
- 1...Qf4
- 2.Qc8#
- 1...Qg4
- 2.Qxe5#
- 1...Qh5
- 2.Se4#
- 2.Qc8#
- 1...Qh7
- 2.Se4#
- 2.Qxe5#
- 1...Qh8
- 2.Se4#
- 2.Qc8#
- 1...Qh1!
- threat
- 1.Qf3?
- threat
- 2.Qd5#
- 2.Qc6#
- 1...Sxe3
- 2.Qc6#
- 1...dxe3
- 2.Qc6#
- 1...Qh1
- 2.Se4#
- 1...Qe4
- 2.Sxe4#
- 1...Se7!
- threat
- 1.Qg2?
- Keys
- 1.Sxd4!
- threat
- 2.Sxb3#
- 1...Qxd4
- 2.Se4#
- 1...Rdxd4
- 2.Sd3#
- 1...Rcxd4
- 2.Rc2#
- 1...Bxd4
- 2.Qxf5#
- 1...Sbxd4
- 2.R2b5#
- 1...Sfxd4
- 2.Qc8#
- 1...Sa1
- 2.Sb3#
- 2.R2b5#
- 2.Rc6#
- 1...Sc1
- 2.Sb3#
- 2.R2b5#
- 2.Rc6#
- 1...Sd2
- 2.Sd3#
- 2.Sb3#
- 2.R2b5#
- 2.Rc6#
- threat
- 1.Sxd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 27
- Sets
- Q(e);N_GUARD::S(C)
- Q(e);N_GUARD,XQ(E)::S(C)
- Q(e);N_GUARD::S(C),XQ(e)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD::S(C),XR(a)
- R(c);OGATEB::R(A),XR(c)
- B(h);S_CUTQ(e)::S(C)
- S(b);OGATE::R1(A)
- S(i);N_SPINP(d),OGATE,XB(D)::QAR(E)
- S(i);OGATE::QAR(E)
- Tries
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- S(i);N_SPINP(d),XB(D)::QAR1(E)
- P(d);N_SPINP(d),XB(D)::QAR1(E)
- Q(e);N_GUARD::S(C)
- Q(e);N_GUARD::S(C),XQ(e)
- Refutation
- S(i);
- Try
- Q(E);P_PINB(h),XS(i)
- Threat
- DUALS(2)
- Vars
- P(d);N_SPINP(d),XB(D)::QAR(E)
- Q(e);N_GUARD::S(C)
- Q(e);N_GUARD::S(C),XQ(e)
- Q(e);::QAR(E)
- Q(e);::QAR2(E),XB(h)
- Refutation
- Q(e);
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- S(i);N_SPINP(d),XB(D)::QAR1(E)
- P(d);N_SPINP(d),XB(D)::QAR1(E)
- Q(e);N_GUARD::S(C)
- Q(e);N_GUARD::S(C),XQ(e)
- Refutation
- S(i);
- Try
- Actual
- S(B);XP(d)
- Threat
- B(D)+S(B),DCHECK,XS(b)
- Vars
- Q(e);N_GUARD,P_SPINQ(e),XS(B)::S(C)
- R(a);N_GUARD,P_SPINR(a),XS(B)::S(C)
- R(c);OGATEB,P_SPINR(c),XS(B)::R(A)
- B(h);OGATEB,P_SPINB(h),XS(B)::QAR(E),XS(i)
- S(b);OGATE,P_SPINS(b),XS(B)::R1(A)
- S(i);OGATE,P_SPINS(i),XS(B)::QAR(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).