MESON Chess Problem Database
Problem Display
PID: 64579 (3r2b1/3n1n2/p7/K2Q1r2/5N1R/2k2Npq/B1PRP3/2B5 w - - 0 1)
Zappas, Byron
1/2 Prize, The Problemist, 1980
#2
10 + 9
| 3752 | FIDE Album (1980-1982) | 1988 |
| 721 | Variantim | 1992 |
SOLUTION
- SOUND
- Sets
- 1...Rxf4
- 2.Qb3#
- 2.Qd3#
- 1...Rxd5+
- 2.Sxd5#
- 1...Rf6
- 2.Qb3#
- 2.Qc4#
- 2.Qd3#
- 2.Qd4#
- 1...Sc5
- 2.Qc4#
- 1...Sde5
- 2.Qb3#
- 1...Sfe5
- 2.Qd4#
- 1...Rxf4
- Tries
- 1.Sd4?
- threat
- 2.Rd3#
- 1...Rxd5+
- 2.Sxd5#
- 1...Sc5
- 2.Qc4#
- 1...Sde5
- 2.Qb3#
- 1...g2
- 2.Rxh3#
- 1...Sfe5!
- threat
- 1.Se5?
- threat
- 2.Qb3#
- 2.Qf3#
- 2.Qc4#
- 2.Qd3#
- 2.Qd4#
- 1...Rxf4
- 2.Qb3#
- 2.Qd3#
- 1...Sdxe5
- 2.Qb3#
- 1...Sfxe5
- 2.Qd4#
- 1...Qf1
- 2.Qb3#
- 2.Qc4#
- 2.Qd3#
- 2.Qd4#
- 1...Qg2
- 2.Qb3#
- 2.Qc4#
- 2.Qd3#
- 2.Qd4#
- 1...Qg4
- 2.Qb3#
- 2.Qc4#
- 2.Qd3#
- 2.Qd4#
- 1...Qh1
- 2.Qb3#
- 2.Qc4#
- 2.Qd3#
- 2.Qd4#
- 1...Rb8
- 2.Qf3#
- 2.Qc4#
- 2.Qd3#
- 2.Qd4#
- 1...Rc8
- 2.Qb3#
- 2.Qf3#
- 2.Qd3#
- 2.Qd4#
- 1...Sc5
- 2.Qc4#
- 2.Qxc5#
- 1...Sb6
- 2.Qb3#
- 1...Sf6
- 2.Qb3#
- 2.Qc4#
- 2.Qc6#
- 2.Qc5#
- 1...Sb8
- 2.Qb3#
- 2.Qc4#
- 2.Qc5#
- 1...Sf8
- 2.Qb3#
- 2.Qc4#
- 2.Qc6#
- 2.Qc5#
- 1...Sg5
- 2.Qd3#
- 2.Qd4#
- 1...Sd6
- 2.Qf3#
- 2.Qd3#
- 2.Qd4#
- 1...Sh6
- 2.Qf3#
- 2.Qd3#
- 2.Qd4#
- 1...Sh8
- 2.Qf3#
- 2.Qd3#
- 2.Qd4#
- 1...g2
- 2.Rxh3#
- 2.Qb3#
- 2.Qc4#
- 2.Qd4#
- 1...Rxe5!
- threat
- 1.Sd3?
- threat
- 2.Bb2#
- 2.Rc4#
- 1...Qxh4
- 2.Bb2#
- 1...Rxf3
- 2.Rc4#
- 2.Qb3#
- 2.Qc4#
- 2.Qd4#
- 1...Qg4
- 2.Bb2#
- 1...Rf4
- 2.Bb2#
- 2.Qb3#
- 1...Rb8
- 2.Rc4#
- 1...Rc8
- 2.Bb2#
- 1...Sde5
- 2.Bb2#
- 2.Qb3#
- 1...Sb6
- 2.Bb2#
- 1...Sfe5
- 2.Bb2#
- 2.Qd4#
- 1...Sd6
- 2.Bb2#
- 1...Rxd5+!
- threat
- 1.Bb1?
- threat
- 2.Rd3#
- 1...Rxd5+
- 2.Sxd5#
- 1...Sde5
- 2.Qb3#
- 1...Sfe5
- 2.Qd4#
- 1...Sc5!
- threat
- 1.Bb3?
- threat
- 2.Rd3#
- 1...Rxd5+
- 2.Sxd5#
- 1...Sc5
- 2.Qc4#
- 1...Sfe5
- 2.Qd4#
- 1...Sde5!
- threat
- 1.Sd4?
- Keys
- 1.Se1!
- threat
- 2.Rd3#
- 1...Rxd5+
- 2.Sxd5#
- 1...Sc5
- 2.Qc4#
- 1...Sde5
- 2.Qb3#
- 1...Sfe5
- 2.Qd4#
- 1...g2
- 2.Rxh3#
- threat
- 1.Se1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(d);CHECK,XQ(J)::S(G),XR(d)
- S(f);N_PINQ(J)::QAR1(J)
- S(g);N_PINQ(J)::QAB1(J)
- Tries
- Try
- S(F);
- Threat
- R1(D)
- Vars
- R(d);CHECK,XQ(J)::S(G),XR(d)
- S(f);N_PINQ(J)::QAR1(J)
- P(b);OGATEB::R(H),XQ(c)
- Refutation
- S(g);N_PINQ(J)
- Try
- S(F);N_SPINQ(J)
- Threat
- DUALS(5)
- Vars
- S(f);XS(F)::QAR1(J)
- S(g);XS(F)::QAB1(J)
- S(f);::QAR1(J)
- Refutation
- R(d);P_PINQ(J),XS(F)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(c);XR(H)::B(A)
- Q(c);::B(A)
- R(h);::R1(H)
- R(h);::B(A)
- S(f);::B(A)
- S(g);::B(A)
- Refutation
- R(d);CHECK,XQ(J)
- Try
- B(B);
- Threat
- R1(D)
- Vars
- R(d);CHECK,XQ(J)::S(G),XR(d)
- S(f);N_PINQ(J)::QAR1(J)
- S(g);N_PINQ(J)::QAB1(J)
- Refutation
- S(f);N_PINQ(J)
- Try
- B(B);
- Threat
- R1(D)
- Vars
- R(d);CHECK,XQ(J)::S(G),XR(d)
- S(f);N_PINQ(J)::QAR1(J)
- S(g);N_PINQ(J)::QAB1(J)
- Refutation
- S(f);N_PINQ(J)
- Try
- Actual
- S(F);
- Threat
- R1(D)
- Vars
- R(d);CHECK,XQ(J)::S(G),XR(d)
- S(f);N_PINQ(J)::QAR1(J)
- S(g);N_PINQ(J)::QAB1(J)
- P(b);OGATEB::R(H),XQ(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).