MESON Chess Problem Database
Problem Display
PID: 264487 (2BR1R2/Q1P4b/2p1P3/4k1pr/KN2N3/2p1rpp1/2nn1p1B/4b3 w - - 0 1)
Zappas, Byron
The Problemist, 1992
#2
10 + 13
SOLUTION
- SOUND
- Sets
- 1...Rxe4
- 2.Qc5#
- 1...Bxe4
- 2.Bxg3#
- 1...Sa1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Sxb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sxe4
- 2.Sxc6#
- 1...Rxe4
- Tries
- 1.Sxf2?
- threat
- 2.Sxc6#
- 2.Bxg3#
- 2.Qc5#
- 1...Rxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Sxb4
- 2.Bxg3#
- 2.Qd4#
- 1...gxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Bf5
- 2.Bxg3#
- 1...Rd3
- 2.Sxc6#
- 2.Bxg3#
- 1...Re4
- 2.Sd3#
- 2.Qc5#
- 1...Rh3
- 2.Sxc6#
- 2.Qc5#
- 1...Rh4
- 2.Qc5#
- 1...Be4
- 2.Sg4#
- 2.Bxg3#
- 1...Sd4
- 2.Bxg3#
- 2.Qxd4#
- 2.Qc5#
- 1...Sf1
- 2.Sxc6#
- 2.Qc5#
- 1...Sb3
- 2.Sxc6#
- 2.Bxg3#
- 1...Se4
- 2.Sg4#
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 2.Bxg3#
- 2.Rd5#
- 2.Qxc5#
- 1...Bxf2!
- threat
- 1.Sxc3?
- threat
- 2.Sxc6#
- 2.Bxg3#
- 2.Qc5#
- 1...Rxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Sxb4
- 2.Bxg3#
- 2.Qd4#
- 1...gxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Bf5
- 2.Bxg3#
- 1...f1Q
- 2.Sxc6#
- 2.Qc5#
- 1...f1S
- 2.Sxc6#
- 2.Qc5#
- 1...f1B
- 2.Sxc6#
- 2.Qc5#
- 1...f1R
- 2.Sxc6#
- 2.Qc5#
- 1...Rd3
- 2.Sxc6#
- 2.Bxg3#
- 1...Re4
- 2.Qc5#
- 1...Rh3
- 2.Sxc6#
- 2.Qc5#
- 1...Rh4
- 2.Qc5#
- 1...Be4
- 2.Bxg3#
- 1...Sd4
- 2.Bxg3#
- 2.Qxd4#
- 2.Qc5#
- 1...Sf1
- 2.Sxc6#
- 2.Qc5#
- 1...Sb3
- 2.Sxc6#
- 2.Bxg3#
- 1...Se4
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 2.Bxg3#
- 2.Rd5#
- 2.Qxc5#
- 1...Rxc3!
- threat
- 1.Sc5?
- threat
- 2.Sxc6#
- 2.Bxg3#
- 1...Rxh2
- 2.Sxc6#
- 1...Sxb4
- 2.Bxg3#
- 1...gxh2
- 2.Sxc6#
- 1...Bf5
- 2.Bxg3#
- 1...f1Q
- 2.Sxc6#
- 1...f1S
- 2.Sxc6#
- 1...f1B
- 2.Sxc6#
- 1...f1R
- 2.Sxc6#
- 1...Re4
- 2.Sd3#
- 1...Rh3
- 2.Sxc6#
- 1...Be4
- 2.Bxg3#
- 1...Sd4
- 2.Bxg3#
- 1...Sf1
- 2.Sxc6#
- 1...Se4
- 2.Sxc6#
- 1...Rh4!
- threat
- 1.Sxg5?
- threat
- 2.Sxc6#
- 2.Bxg3#
- 2.Qc5#
- 1...Rxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Sxb4
- 2.Bxg3#
- 2.Qd4#
- 1...gxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Bf5
- 2.Bxg3#
- 1...f1Q
- 2.Sxc6#
- 2.Qc5#
- 1...f1S
- 2.Sxc6#
- 2.Qc5#
- 1...f1B
- 2.Sxc6#
- 2.Qc5#
- 1...f1R
- 2.Sxc6#
- 2.Qc5#
- 1...Rd3
- 2.Sxc6#
- 2.Bxg3#
- 1...Re4
- 2.Qc5#
- 1...Rh3
- 2.Sxc6#
- 2.Qc5#
- 1...Rh4
- 2.Qc5#
- 1...Be4
- 2.Bxg3#
- 1...Sd4
- 2.Bxg3#
- 2.Qxd4#
- 2.Qc5#
- 1...Sf1
- 2.Sxc6#
- 2.Qc5#
- 1...Sb3
- 2.Sxc6#
- 2.Bxg3#
- 1...Se4
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 2.Bxg3#
- 2.Rd5#
- 2.Qxc5#
- 1...Rxg5!
- threat
- 1.Sd6?
- threat
- 2.Bxg3#
- 2.Qc5#
- 1...Rxh2
- 2.Qc5#
- 1...gxh2
- 2.Qc5#
- 1...Bf5
- 2.Bxg3#
- 2.Rxf5#
- 1...c5
- 2.Qxc5#
- 1...f1Q
- 2.Qc5#
- 1...f1S
- 2.Qc5#
- 1...f1B
- 2.Qc5#
- 1...f1R
- 2.Qc5#
- 1...Rd3
- 2.Bxg3#
- 1...Re4
- 2.Qc5#
- 1...Rh3
- 2.Qc5#
- 1...Rh4
- 2.Qc5#
- 1...Be4
- 2.Bxg3#
- 1...Sf1
- 2.Qc5#
- 1...Sb3
- 2.Bxg3#
- 1...Se4
- 2.Sc4#
- 1...Sxb4!
- threat
- 1.Rd4?
- threat
- 2.Sxc6#
- 2.Bxg3#
- 2.Qc5#
- 1...Rxe4
- 2.Sd3#
- 2.Sxc6#
- 2.Qc5#
- 1...Rxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Bxe4
- 2.Bxg3#
- 1...Sxb4
- 2.Bxg3#
- 1...Sxe4
- 2.Sxc6#
- 1...gxh2
- 2.Sxc6#
- 2.Qc5#
- 1...Bf5
- 2.Bxg3#
- 1...c5
- 2.Sc6#
- 2.Qxc5#
- 1...f1Q
- 2.Sxc6#
- 2.Qc5#
- 1...f1S
- 2.Sxc6#
- 2.Qc5#
- 1...f1B
- 2.Sxc6#
- 2.Qc5#
- 1...f1R
- 2.Sxc6#
- 2.Qc5#
- 1...Rh3
- 2.Sxc6#
- 2.Qc5#
- 1...Rh4
- 2.Sxc6#
- 2.Qc5#
- 1...Sf1
- 2.Sxc6#
- 2.Qc5#
- 1...Sb3
- 2.Sxc6#
- 2.Bxg3#
- 1...Sxd4!
- threat
- 1.Qxe3?
- threat
- 2.Sd3#
- 2.Sxc6#
- 2.Bxg3#
- 1...Rxh2
- 2.Sd3#
- 2.Sxc6#
- 1...Sxb4
- 2.Bxg3#
- 2.Qd4#
- 1...gxh2
- 2.Sd3#
- 2.Sxc6#
- 1...f1Q
- 2.Sxc6#
- 1...f1S
- 2.Sd3#
- 2.Sxc6#
- 1...f1B
- 2.Sxc6#
- 1...f1R
- 2.Sd3#
- 2.Sxc6#
- 1...Rh3
- 2.Sd3#
- 2.Sxc6#
- 1...Rh4
- 2.Sd3#
- 2.Sxc6#
- 1...Sd4
- 2.Sd3#
- 2.Bxg3#
- 2.Qxd4#
- 1...Sf1
- 2.Sd3#
- 2.Sxc6#
- 1...c5
- 2.Sd3#
- 2.Sc6#
- 2.Bxg3#
- 2.Rd5#
- 1...Sxe3!
- threat
- 1.Sxf2?
- Keys
- 1.Sxg3!
- threat
- 2.Sxc6#
- 2.Qc5#
- 1...Sxb4
- 2.Qd4#
- 1...Bf5
- 2.Rxf5#
- 1...Rd3
- 2.Sxc6#
- 1...Re4
- 2.Qc5#
- 1...Rh4
- 2.Qc5#
- 1...Be4
- 2.Sxh5#
- 1...Sd4
- 2.Qxd4#
- 2.Qc5#
- 1...Sb3
- 2.Sxc6#
- 1...Se4
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 2.Rd5#
- 2.Qxc5#
- threat
- 1.Sxg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- R(f);P_PINS(C),SBLOCK,XS(D)::QAR2(F)
- B(m);SBLOCK,XS(D)::B(A),XP(h)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD,XS(C)::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- S(c);SBLOCK,XS(D)::S(C),XP(l)
- Tries
- Try
- S(D);XP(d)
- Threat
- DUALS(3)
- Vars
- B(m);::B(A),XP(h)
- R(k);P_PINS(C)::QAR2(F)
- Refutation
- B(a);XS(D)
- Try
- S(D);XP(e)
- Threat
- DUALS(3)
- Vars
- B(m);::B(A),XP(h)
- R(f);P_PINS(C)::QAR2(F)
- R(k);P_PINS(C)::QAR2(F)
- S(c);::S(C),XP(l)
- Refutation
- R(f);XS(D)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(k);N_SPINP(h),XB(A)::S(C),XP(l)
- S(b);XS(C)::B(A),XP(h)
- P(h);N_SPINP(h),XB(A)::S(C),XP(l)
- B(m);::B(A),XP(h)
- P(d);::S(C),XP(l)
- R(f);N_GUARD,P_PINS(C),SBLOCK,S_CUTB(m)::S(D)
- R(k);::S(C),XP(l)
- S(b);::B(A),XP(h)
- S(c);::S(C),XP(l)
- Refutation
- R(k);P_PINS(C)
- Try
- S(D);XP(j)
- Threat
- DUALS(3)
- Vars
- B(m);::B(A),XP(h)
- R(f);P_PINS(C)::QAR2(F)
- R(k);P_PINS(C)::QAR2(F)
- S(c);::S(C),XP(l)
- Refutation
- R(k);XS(D)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(k);N_SPINP(h),XB(A)::QAR2(F)
- P(h);N_SPINP(h),XB(A)::QAR2(F)
- P(l);::QAR2(F),XP(l)
- P(d);::QAR2(F)
- R(f);::B(A),XP(h)
- R(f);P_PINS(C)::QAR2(F)
- R(k);::QAR2(F)
- R(k);P_PINS(C)::QAR2(F)
- B(m);::B(A),XP(h)
- S(c);::QAR2(F)
- S(c);::B(A),XP(h)
- S(c);N_GUARD,SBLOCK::S(D)
- Refutation
- S(b);XS(C)
- Try
- R(I);
- Threat
- DUALS(3)
- Vars
- B(m);XS(D)::B(A),XP(h)
- S(b);XS(C)::B(A),XP(h)
- S(c);XS(D)::S(C),XP(l)
- B(m);::B(A),XP(h)
- Refutation
- S(b);XR(I)
- Try
- Q(F);XR(f)
- Threat
- DUALS(3)
- Vars
- P(d);::S(C),XP(l)
- Refutation
- S(b);XQ(F)
- Try
- Actual
- S(D);XP(h)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,XS(C)::QAB1(F)
- B(m);N_GUARD::R1(J),XB(m)
- R(f);::S(C),XP(l)
- R(f);P_PINS(C)::QAR2(F)
- R(k);P_PINS(C)::QAR2(F)
- B(m);SBLOCK::B(A)+S(D),XR(k)
- S(c);::S(C),XP(l)
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).