MESON Chess Problem Database
Problem Display
PID: 10771 (5b2/2pKn3/R7/p1rk4/2RN3r/1B1PBN2/2q5/7Q w - - 0 1)
Zappas, Byron
3rd Comm., BCF 116. Ty., 1967-1968
#2
9 + 8
| 4655 | Michael Keller Ein Meister der Schachkomposition | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Rxd4
- 2.Rxd4#
- 1...Rxd4
- Tries
- 1.Sd2+?
- 1...Ke5
- 2.Re6#
- 1...Re4
- 2.Qxe4#
- 1...Rxh1!
- 1...Ke5
- 1.Sh2+?
- 1...Ke5
- 2.Re6#
- 1...Re4
- 2.Qxe4#
- 1...Qg2!
- 1...Ke5
- 1.Sxh4+?
- 1...Ke5
- 2.Re6#
- 2.Qe4#
- 1...Qg2!
- 1...Ke5
- 1.Se2?
- threat
- 2.Rd4#
- 2.Rxc5#
- 1...Qxb3
- 2.Rxc5#
- 1...Qxd3
- 2.Rd4#
- 1...Qxc4
- 2.Sc3#
- 1...Rhxc4
- 2.Sf4#
- 1...Rd4
- 2.Rxd4#
- 1...Rb5
- 2.Rc5#
- 1...Rc6
- 2.Rc5#
- 1...Rcxc4!
- threat
- 1.Sb5?
- threat
- 2.Rd4#
- 2.Rxc5#
- 1...Qxb3
- 2.Rxc5#
- 1...Qxd3
- 2.Rd4#
- 1...Qxc4
- 2.Sc3#
- 1...Rcxc4
- 2.Sxc7#
- 1...Rxb5
- 2.Rc5#
- 1...Rd4
- 2.Rxd4#
- 1...Rc6
- 2.Rc5#
- 1...Rhxc4!
- threat
- 1.Se6?
- threat
- 2.Rd4#
- 2.Rxc5#
- 1...Qxb3
- 2.Rxc5#
- 1...Qxd3
- 2.Rd4#
- 1...Rhxc4
- 2.Sf4#
- 1...Rcxc4
- 2.Sxc7#
- 1...Rd4
- 2.Rxd4#
- 2.Rxc5#
- 1...Rb5
- 2.Sxc7#
- 2.Rd4#
- 2.Rc5#
- 1...Rc6
- 2.Rd4#
- 2.Rc5#
- 1...Qxc4!
- threat
- 1.Rxa5?
- threat
- 2.Rxc2#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qxb3
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qxc4
- 2.Bxc4#
- 1...Rxd4
- 2.Rxd4#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Rxa5
- 2.Rxc2#
- 1...Qg2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rca4#
- 2.Rb4#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qb1
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qd1
- 2.Rc2#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qc1
- 2.Rxc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qa2
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qb2
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qd2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rca4#
- 2.Rb4#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qe2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rca4#
- 2.Rb4#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qf2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rca4#
- 2.Rb4#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qh2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rca4#
- 2.Rb4#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Qc3
- 2.Rxc3#
- 2.Rcxc5#
- 2.Raxc5#
- 1...Rb5
- 2.Rxc2#
- 1...Sf5
- 2.Rxc2#
- 2.Rcxc5#
- 1...Sc6
- 2.Rxc2#
- 2.Rcxc5#
- 1...Sg6
- 2.Rxc2#
- 2.Rcxc5#
- 1...Sc8
- 2.Rxc2#
- 2.Rcxc5#
- 1...Sg8
- 2.Rxc2#
- 2.Rcxc5#
- 1...Qxd3!
- threat
- 1.Sd2+?
- Keys
- 1.Sc6!
- threat
- 2.Rd4#
- 2.Rxc5#
- 1...Qxb3
- 2.Sxh4#
- 2.Rxc5#
- 1...Qxd3
- 2.Rd4#
- 1...Qxc4
- 2.Sxh4#
- 1...Rhxc4
- 2.Sd2#
- 1...Rcxc4
- 2.Rxa5#
- 1...Rxc6
- 2.Rc5#
- 1...Rd4
- 2.Rxd4#
- 1...Rb5
- 2.Rc5#
- threat
- 1.Sc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(b);OGATE,XS(G)::B(B)+R(F),DCHECK,XR(b)
- Tries
- Try
- S(E);CHECK
- Vars
- K(e);P-FLIGHT::R1(H)
- R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
- Refutation
- R(b);XQ(A)
- Try
- S(E);CHECK
- Vars
- K(e);P-FLIGHT::R1(H)
- R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
- Refutation
- Q(a);P_SPINQ(a)
- Try
- S(E);CHECK,XR(b)
- Refutation
- Q(a);P_SPINQ(a)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(a);XB(B)::R1(F),XR(d)
- Q(a);XP(C)::B(B)+R(F),DCHECK
- Q(a);N_GUARD,P_SPINQ(a),XR(F)::S(G)
- R(b);N_GUARD,P_SPINR(b),XR(F)::S(G)
- R(b);::B(B)+R(F),DCHECK,XR(b)
- R(d);::B(B)+R(F),DCHECK
- Refutation
- R(d);P_SPINR(d),XR(F)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(a);XB(B)::R1(F),XR(d)
- Q(a);XP(C)::B(B)+R(F),DCHECK
- Q(a);N_GUARD,P_SPINQ(a),XR(F)::S(G)
- R(d);N_GUARD,P_SPINR(d),XR(F)::S(G),XP(f)
- R(d);XS(G)::B(B)+R(F),DCHECK
- R(b);::B(B)+R(F),DCHECK,XR(b)
- R(d);::B(B)+R(F),DCHECK
- Refutation
- R(b);P_SPINR(b),XR(F)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(a);XB(B)::R1(F),XR(d)
- Q(a);XP(C)::B(B)+R(F),DCHECK
- R(b);N_GUARD,P_SPINR(b),XR(F)::S(G)
- R(d);N_GUARD,P_SPINR(d),XR(F)::S(G),XP(f)
- Refutation
- Q(a);P_SPINQ(a),XR(F)
- Try
- R(H);P_PINR(d),XP(c)
- Threat
- DUALS(3)
- Vars
- Q(a);OGATE,P_SPINQ(a),XR(F)::B(B),XQ(a)
- R(d);N_SPINR(d),XR(H)::B(B)+R(F),XQ(a)
- R(d);::B(B)+R(F),XQ(a)
- Refutation
- Q(a);XP(C)
- Try
- Actual
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(a);XP(C)::B(B)+R(F),DCHECK
- Q(a);N_GUARD,P_SPINQ(a),XR(F)::QAB(A)+S(E),XR(b)
- R(b);N_GUARD,P_SPINR(b),XR(F)::QAB(A)+S(E)
- R(d);OGATEB,P_SPINR(d),XR(F)::R(H),XP(c)
- R(d);XS(G)::B(B)+R(F),DCHECK
- R(b);::B(B)+R(F),DCHECK,XR(b)
- R(d);::B(B)+R(F),DCHECK
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).