MESON Chess Problem Database
Problem Display
PID: 67215 (5r2/3N4/3Rp3/2pP2p1/4k1Pp/2Kn4/4b1P1/1QB2RnN w - - 0 1)
Zappas, Byron
18th Place, 05. WCCT, 1993-1997
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Rf2
- 2.Sxf2#
- 1...Ra8
- 2.Sf2#
- 1...Rb8
- 2.Sf2#
- 1...Rc8
- 2.Sf2#
- 1...Rd8
- 2.Sf2#
- 1...Re8
- 2.Sf2#
- 1...Rg8
- 2.Sf2#
- 1...Rh8
- 2.Sf2#
- 1...Bd1
- 2.Qxd3#
- 1...Bf3
- 2.Sf2#
- 2.Qxd3#
- 1...Bxg4
- 2.Qxd3#
- 1...Sf3
- 2.Sf2#
- 1...h3
- 2.Sg3#
- 1...exd5
- 2.Re6#
- 1...e5
- 2.Sxc5#
- 1...Rf2
- Tries
- 1.Sf6+?
- 1...Ke5
- 2.Rxe6#
- 1...Rxf6!
- 1...Ke5
- 1.Rf4+?
- 1...gxf4
- 2.Sf2#
- 1...Rxf4!
- 1...gxf4
- 1.Rf5?
- threat
- 2.Sf2#
- 2.Sxc5#
- 2.Re5#
- 2.Rxe6#
- 1...Bxg4
- 2.Re5#
- 2.Qxd3#
- 1...exd5
- 2.Sf2#
- 2.Sxc5#
- 2.Re5#
- 2.Re6#
- 1...exf5
- 2.Sf2#
- 1...Rf6
- 2.Sf2#
- 2.Sxc5#
- 2.Sxf6#
- 2.Re5#
- 1...Rc8
- 2.Sf2#
- 2.Sf6#
- 2.Re5#
- 2.Rxe6#
- 1...Re8
- 2.Sf2#
- 2.Sxc5#
- 2.Sf6#
- 2.Re5#
- 1...Sf3
- 2.Sf2#
- 2.Sxc5#
- 1...Sh3
- 2.Sxc5#
- 2.Re5#
- 2.Rxe6#
- 1...c4
- 2.Sf2#
- 2.Sc5#
- 2.Re5#
- 2.Rxe6#
- 1...e5
- 2.Sf2#
- 2.Sxc5#
- 2.Rxe5#
- 1...Rxf5!
- threat
- 1.Rf6?
- threat
- 2.Sf2#
- 2.Rfxe6#
- 1...Bxg4
- 2.Sf2#
- 2.Qxd3#
- 1...exd5
- 2.Sf2#
- 2.Rde6#
- 2.Rfe6#
- 1...Re8
- 2.Sf2#
- 1...Sf3
- 2.Sf2#
- 1...Sh3
- 2.Rfxe6#
- 1...e5
- 2.Sf2#
- 2.Sxc5#
- 1...Rxf6!
- threat
- 1.Qb3?
- threat
- 2.Qc4#
- 1...Sxc1
- 2.Rxe6#
- 1...exd5
- 2.Qxd5#
- 1...Se1
- 2.Rxe6#
- 1...Sb2
- 2.Rxe6#
- 1...Sf2
- 2.Rxe6#
- 1...Sb4
- 2.Rxe6#
- 1...Sf4
- 2.Sf2#
- 1...Se5
- 2.Sxc5#
- 1...c4
- 2.Qxc4#
- 1...Sf3!
- threat
- 1.dxe6?
- threat
- 2.Qb7#
- 1...Rb8
- 2.Sf2#
- 1...Rc8
- 2.Sf2#
- 1...Rf5!
- threat
- 1.Sf6+?
- Keys
- 1.Qa2!
- threat
- 2.Qc4#
- 1...Sxc1
- 2.Rxe6#
- 1...exd5
- 2.Qxd5#
- 1...Sf3
- 2.Qxe2#
- 1...Se1
- 2.Rxe6#
- 1...Sb2
- 2.Rxe6#
- 1...Sf2
- 2.Rxe6#
- 1...Sb4
- 2.Rxe6#
- 1...Sf4
- 2.Sf2#
- 1...Se5
- 2.Sxc5#
- 1...c4
- 2.Qxc4#
- threat
- 1.Qa2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 8
- REMOVED MATES = 12
- Sets
- R(i);N_GUARD::S(D),XR(i)
- R(i);N_GUARD::S(D)
- B(b);N_GUARD::QAB1(A),XS(c)
- B(b);N_GUARD,XP(G)::QAB1(A),XS(c)
- S(a);S_CUTR(i)::S(D)
- P(e);N_GUARD::S(D)
- P(h);SBLOCK,XP(H)::R(I)
- P(h);SBLOCK::S(J),XP(f)
- Tries
- Try
- S(J);CHECK
- Vars
- K(d);N_SPINS(c),P-FLIGHT::R1(I),XP(h)
- Refutation
- R(i);XS(J)
- Try
- R(C);CHECK
- Vars
- P(g);XR(C)::S(D)
- Refutation
- R(i);XR(C)
- Try
- R(C);
- Threat
- DUALS(4)
- Vars
- P(h);XR(C)::S(D)
- Refutation
- R(i);XR(C)
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- R(i);::S(D)
- S(a);::S(D)
- S(a);::R(C),XP(h)
- Refutation
- R(i);XR(C)
- Try
- Q(A);N_PINS(c)
- Threat
- QAR2(A)
- Vars
- S(c);N_GUARD,XB(B)::R(I),XP(h)
- P(h);OGATE,XP(H)::QAB1(A),XP(h)
- S(c);N_GUARD::R(I),XP(h)
- S(c);N_GUARD,S_CUTR(i)::S(D)
- S(c);N_GUARD,SBLOCK::S(J),XP(f)
- P(f);::QAR2(A),XP(f)
- Refutation
- S(a);
- Try
- P(H);XP(h)
- Threat
- QAB(A)
- Vars
- R(i);N_GUARD::S(D)
- Refutation
- R(i);
- Try
- Actual
- Q(A);N_PINS(c)
- Threat
- QAR2(A)
- Vars
- S(c);N_GUARD,XB(B)::R(I),XP(h)
- P(h);OGATE,XP(H)::QAB1(A),XP(h)
- S(a);N_GUARD::QAR2(A),XB(b)
- S(c);N_GUARD::R(I),XP(h)
- S(c);N_GUARD,S_CUTR(i)::S(D)
- S(c);N_GUARD,SBLOCK::S(J),XP(f)
- P(f);::QAR2(A),XP(f)
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).