MESON Chess Problem Database
Problem Display
PID: 61951 (2Q1r3/8/Bn3pP1/4P1p1/1p3NR1/1r3kBP/p1b3Np/1qn1R2K w - - 0 1)
Zappas, Byron
5th Prize, Piatesi JT, 1984
#2
11 + 12
| 3748 | FIDE Album (1983-1985) | 1992 |
SOLUTION
- SOUND
- Sets
- 1...Rb2
- 2.Re3#
- 1...Re3
- 2.Rxe3#
- 1...Bd3
- 2.Re3#
- 1...Be4
- 2.Rf1#
- 1...gxf4
- 2.Sh4#
- 1...Rb2
- Tries
- 1.Se6?
- threat
- 2.Sd4#
- 2.Rf1#
- 1...Rxe6
- 2.Rf1#
- 1...fxe5
- 2.Sxg5#
- 2.Rf1#
- 1...a1Q
- 2.Rf1#
- 1...a1B
- 2.Rf1#
- 1...Sd3
- 2.Sd4#
- 1...Qa1
- 2.Rf1#
- 1...Qb2
- 2.Rf1#
- 1...Rd8
- 2.Rf1#
- 1...Bd3
- 2.Sd4#
- 2.Re3#
- 1...Se2
- 2.Bxe2#
- 1...Sc4
- 2.Sd4#
- 1...Rd3!
- threat
- 1.Bb7+?
- 1...Be4
- 2.Rf1#
- 1...Sd5!
- 1...Be4
- 1.Rxg5?
- threat
- 2.Sh4#
- 2.Qg4#
- 1...Rxc8
- 2.Sh4#
- 1...Sxc8
- 2.Sh4#
- 1...fxg5
- 2.Qg4#
- 1...Re3
- 2.Rxe3#
- 1...Re6
- 2.Sh4#
- 1...Rh8
- 2.Qg4#
- 1...Bf5
- 2.Sh4#
- 1...Sd7
- 2.Sh4#
- 1...f5
- 2.Sh4#
- 1...Se2!
- threat
- 1.Qf5?
- threat
- 2.Sd3#
- 2.Rf1#
- 1...Rxe5
- 2.Rf1#
- 1...gxf4
- 2.Sh4#
- 2.Rf1#
- 2.Qxf4#
- 1...Sd3
- 2.Sxd3#
- 2.Qe4#
- 1...Rd3
- 2.Se2#
- 2.Sxd3#
- 2.Sd5#
- 2.Sh5#
- 2.Se6#
- 2.Rf1#
- 2.Qe4#
- 1...Bd3
- 2.Sxd3#
- 2.Re3#
- 1...Be4
- 2.Rf1#
- 1...Se2
- 2.Bxe2#
- 1...Sd5
- 2.Rf1#
- 1...Bxf5!
- threat
- 1.Qb7+?
- 1...Be4
- 2.Rf1#
- 1...Sd5!
- 1...Be4
- 1.Qxc2?
- threat
- 2.Rf1#
- 2.Qf2#
- 1...Sd3
- 2.Qe2#
- 1...Qb2
- 2.Rf1#
- 2.Qe4#
- 1...Rb2
- 2.Rf1#
- 2.Re3#
- 1...Rd3
- 2.Qf2#
- 1...Re3
- 2.Rf1#
- 2.Rxe3#
- 1...Se2
- 2.Bxe2#
- 2.Qxe2#
- 1...Qxc2!
- threat
- 1.Qc4?
- threat
- 2.Rf1#
- 2.Qf1#
- 1...Sd3
- 2.Qe4#
- 1...Rd3
- 2.Rf1#
- 2.Qe4#
- 1...Re3
- 2.Rf1#
- 2.Rxe3#
- 1...Bd3
- 2.Re3#
- 1...Se2
- 2.Qxe2#
- 1...Sxc4!
- threat
- 1.Qc5?
- threat
- 2.Qf2#
- 1...Re3
- 2.Rxe3#
- 2.Qxe3#
- 1...Sd3
- 2.Qe3#
- 1...Se2!
- threat
- 1.Qc6+?
- 1...Be4
- 2.Rf1#
- 1...Sd5!
- 1...Be4
- 1.Se6?
- Keys
- 1.Se2!
- threat
- 2.Sd4#
- 2.Rf1#
- 1...Sxe2
- 2.Bxe2#
- 1...fxe5
- 2.Rf1#
- 1...a1Q
- 2.Rf1#
- 1...a1B
- 2.Rf1#
- 1...Qa1
- 2.Rf1#
- 1...Qb2
- 2.Rf1#
- 1...Rd3
- 2.Qf5#
- 1...Rd8
- 2.Rf1#
- 1...Bd3
- 2.Sd4#
- 1...Sd3
- 2.Sd4#
- 1...Sc4
- 2.Sd4#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 10
- REMOVED MATES = 4
- Sets
- R(f);N_GUARD::R1(A)
- R(f);N_GUARD::R1(A),XR(f)
- B(d);S_CUTR(f)::R1(A)
- B(d);SBLOCK::R(A)
- P(i);N_GUARD,XS(F)::S(C)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(l);XS(F)::R(A)
- P(c);::R(A)
- S(b);P_PINR(A)::S(F)
- Q(a);::R(A)
- R(l);::R(A)
- S(b);N_GUARD,P_PINR(A)::B(I),XS(b)
- S(j);::S(F)
- Refutation
- R(f);
- Try
- B(I);CHECK
- Vars
- B(d);P_SPINB(d)::R(A)
- Refutation
- S(j);P_SPINS(j)
- Try
- R(G);XP(i)
- Threat
- DUALS(2)
- Vars
- R(l);XQ(K)::S(C)
- S(j);XQ(K)::S(C)
- P(k);XR(G)::QAB1(K)
- R(f);N_GUARD::R1(A),XR(f)
- R(l);::S(C)
- R(l);::QAB1(K)
- B(d);::S(C)
- S(j);::S(C)
- P(k);::S(C)
- Refutation
- S(b);P_PINR(A)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- R(l);XP(H)::R(A)
- B(d);::R(A)
- S(b);N_GUARD,P_PINR(A)::B(I),XS(b)
- S(j);::R(A)
- Refutation
- B(d);XQ(K)
- Try
- Q(K);CHECK
- Vars
- B(d);P_SPINB(d)::R(A)
- Refutation
- S(j);P_SPINS(j)
- Try
- Q(K);XB(d)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,P_PINR(A)::QAB1(K)
- R(f);::QAR1(K)
- Refutation
- Q(a);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- S(b);P_PINR(A),S_CUTB(d)::QAB1(K)
- B(d);S_CUTR(f)::R1(A)
- S(b);N_GUARD,P_PINR(A)::QAB1(K),XS(b)
- Refutation
- S(j);XQ(K)
- Try
- Q(K);
- Threat
- QAR1(K)
- Vars
- S(b);P_PINR(A),S_CUTR(f)::QAR1(K)
- Refutation
- S(b);P_PINR(A)
- Try
- Q(K);CHECK
- Vars
- B(d);P_SPINB(d)::R(A)
- Refutation
- S(j);P_SPINS(j)
- Try
- Actual
- S(F);
- Threat
- DUALS(2)
- Vars
- S(b);OGATE,P_PINR(A),XS(F)::B(I),XS(b)
- P(k);XP(H)::R(A)
- P(c);::R(A)
- Q(a);::R(A)
- R(f);S_CUTB(d)::QAR2(K)
- R(l);::R(A)
- B(d);::S(F)
- S(b);P_PINR(A)::S(F)
- S(j);::S(F)
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