MESON Chess Problem Database
Problem Display
PID: 137746 (K7/1p2Rp1n/pQ1N4/P1NknBp1/R2p4/8/3r4/7q w - - 0 1)
Ellerman, Arnoldo
Problem (Zagreb), 1964
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Qe4
- 2.Bxe4#
- 1...Qa1
- 2.Be4#
- 1...Qc1
- 2.Be4#
- 1...Qd1
- 2.Be4#
- 1...Qf1
- 2.Be4#
- 1...Qg1
- 2.Be4#
- 1...Qh2
- 2.Be4#
- 1...Qh3
- 2.Be4#
- 1...Qh5
- 2.Be4#
- 1...Qh6
- 2.Be4#
- 1...Rg2
- 2.Be4#
- 1...Sf3
- 2.Be4#
- 1...f6
- 2.Be6#
- 1...Qe4
- Tries
- 1.Sb3?
- threat
- 2.Qc5#
- 1...Qc1
- 2.Be4#
- 1...Rc2
- 2.Rxd4#
- 1...Sd3
- 2.Rxd4#
- 1...Sd7!
- threat
- 1.Sd3?
- threat
- 2.Sb4#
- 2.Rxd4#
- 2.Rxe5#
- 2.Qc5#
- 1...Sxd3
- 2.Rxd4#
- 1...Sc6
- 2.Qc5#
- 1...Qe4
- 2.Sb4#
- 2.Bxe4#
- 2.Qc5#
- 1...Qa1
- 2.Sb4#
- 2.Be4#
- 2.Rxe5#
- 2.Qc5#
- 1...Qb1
- 2.Be4#
- 2.Rxd4#
- 2.Rxe5#
- 2.Qc5#
- 1...Qc1
- 2.Sb4#
- 2.Be4#
- 2.Rxd4#
- 2.Rxe5#
- 1...Qe1
- 2.Sb4#
- 2.Rxd4#
- 2.Qc5#
- 1...Qg1
- 2.Sb4#
- 2.Be4#
- 2.Rxe5#
- 2.Qc5#
- 1...Qh2
- 2.Sb4#
- 2.Be4#
- 2.Rxd4#
- 2.Qc5#
- 1...Qh4
- 2.Sb4#
- 2.Rxe5#
- 2.Qc5#
- 1...Rb2
- 2.Rxd4#
- 2.Rxe5#
- 2.Qc5#
- 1...Rc2
- 2.Sb4#
- 2.Rxd4#
- 2.Rxe5#
- 1...Re2
- 2.Sb4#
- 2.Rxd4#
- 2.Qc5#
- 1...Sf3
- 2.Sb4#
- 2.Be4#
- 2.Qc5#
- 1...Sc4
- 2.Sb4#
- 2.Qc5#
- 1...Sg4
- 2.Sb4#
- 2.Rxd4#
- 2.Qc5#
- 1...Sg6
- 2.Sb4#
- 2.Rxd4#
- 2.Qc5#
- 1...Sd7
- 2.Sb4#
- 2.Rxd4#
- 1...f6
- 2.Sb4#
- 2.Be6#
- 2.Rxd4#
- 2.Qc5#
- 1...Rxd3!
- threat
- 1.Sce4?
- threat
- 2.Qc5#
- 1...Qxe4
- 2.Bxe4#
- 1...Rc2
- 2.Rxd4#
- 1...Sd3
- 2.Rxd4#
- 2.Qxb7#
- 1...Sd7
- 2.Qxb7#
- 1...Qc1!
- threat
- 1.Sxa6?
- threat
- 2.Sb4#
- 2.Sc7#
- 2.Qc5#
- 1...Sc6
- 2.Qc5#
- 1...Qb1
- 2.Sc7#
- 2.Qc5#
- 1...Qc1
- 2.Sb4#
- 2.Be4#
- 1...Rb2
- 2.Sc7#
- 2.Rxd4#
- 2.Qc5#
- 1...Rc2
- 2.Sb4#
- 2.Rxd4#
- 1...Sd3
- 2.Sc7#
- 2.Rxd4#
- 1...Sd7
- 2.Sb4#
- 2.Sc7#
- 1...bxa6!
- threat
- 1.Scxb7?
- threat
- 2.Qc5#
- 1...Qc1
- 2.Be4#
- 1...Rc2
- 2.Rxd4#
- 1...Sd3
- 2.Rxd4#
- 1...Sd7!
- threat
- 1.Sd7?
- threat
- 2.Rxe5#
- 2.Qc5#
- 1...Sc6
- 2.Qc5#
- 1...Qe4
- 2.Bxe4#
- 2.Qc5#
- 1...Qc1
- 2.Be4#
- 2.Rxe5#
- 1...Qe1
- 2.Qc5#
- 1...Qh2
- 2.Be4#
- 2.Qc5#
- 1...Rc2
- 2.Rxd4#
- 2.Rxe5#
- 1...Re2
- 2.Rxd4#
- 2.Qc5#
- 1...Sd3
- 2.Rxd4#
- 1...Sf3
- 2.Be4#
- 2.Qc5#
- 1...Sc4
- 2.Qc5#
- 1...Sg4
- 2.Qc5#
- 1...Sg6
- 2.Qc5#
- 1...f6
- 2.Be6#
- 2.Qc5#
- 1...Sxd7!
- threat
- 1.Sc4?
- threat
- 2.Rxe5#
- 2.Qd6#
- 1...d3
- 2.Se3#
- 2.Qd6#
- 1...Qe4
- 2.Bxe4#
- 2.Qd6#
- 1...Qe1
- 2.Qd6#
- 1...Qh2
- 2.Be4#
- 2.Qd6#
- 1...Qh6
- 2.Be4#
- 2.Rxe5#
- 1...Re2
- 2.Qd6#
- 1...Sd3
- 2.Rd7#
- 2.Qd6#
- 1...Sf3
- 2.Be4#
- 2.Rd7#
- 2.Qd6#
- 1...Sg4
- 2.Rd7#
- 2.Qd6#
- 1...Sc6
- 2.Rd7#
- 1...Sg6
- 2.Rd7#
- 2.Qd6#
- 1...Sd7
- 2.Rxd7#
- 2.Qd6#
- 1...f6
- 2.Be6#
- 2.Qd6#
- 1...Sxc4!
- threat
- 1.Sde4?
- threat
- 2.Qd6#
- 1...Qxe4
- 2.Bxe4#
- 1...Sc4
- 2.Qxb7#
- 1...Sc6
- 2.Qb3#
- 1...Qh6!
- threat
- 1.Sdxb7?
- threat
- 2.Qd6#
- 1...Qh6
- 2.Be4#
- 1...Sc6
- 2.Qb3#
- 1...Sc4!
- threat
- 1.Sxf7?
- threat
- 2.Be6#
- 2.Rxe5#
- 2.Qd6#
- 1...Qe4
- 2.Bxe4#
- 2.Be6#
- 2.Qd6#
- 1...Qe1
- 2.Be6#
- 2.Qd6#
- 1...Qh2
- 2.Be4#
- 2.Be6#
- 2.Qd6#
- 1...Qh3
- 2.Be4#
- 2.Rxe5#
- 2.Qd6#
- 1...Qh6
- 2.Be4#
- 2.Rxe5#
- 1...Re2
- 2.Be6#
- 2.Qd6#
- 1...Sd3
- 2.Be6#
- 2.Rd7#
- 2.Qd6#
- 1...Sf3
- 2.Be4#
- 2.Be6#
- 2.Rd7#
- 2.Qd6#
- 1...Sc4
- 2.Be6#
- 1...Sg4
- 2.Be6#
- 2.Rd7#
- 2.Qd6#
- 1...Sc6
- 2.Be6#
- 2.Rd7#
- 1...Sg6
- 2.Be6#
- 2.Rd7#
- 2.Qd6#
- 1...Sd7
- 2.Be6#
- 2.Rxd7#
- 2.Qd6#
- 1...Sf8
- 2.Rxe5#
- 2.Qd6#
- 1...Sxf7!
- threat
- 1.Se8?
- threat
- 2.Sc7#
- 2.Qd6#
- 1...Qh6
- 2.Sc7#
- 2.Be4#
- 1...Sc4
- 2.Sc7#
- 1...Sc6!
- threat
- 1.Sb3?
- Keys
- 1.Se6!
- threat
- 2.Sc7#
- 2.Qc5#
- 1...fxe6
- 2.Bxe6#
- 1...Sd3
- 2.Sc7#
- 1...Sc6
- 2.Qc5#
- 1...Sd7
- 2.Sc7#
- 1...Qc1
- 2.Be4#
- 1...Rc2
- 2.Rxd4#
- threat
- 1.Se6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 12
- Sets
- Q(a);N_GUARD::B(D),XQ(a)
- Q(a);N_GUARD::B(D)
- R(b);S_CUTQ(a)::B(D)
- S(e);S_CUTQ(a)::B(D)
- P(i);N_GUARD::B(D)
- Tries
- Try
- S(C);
- Threat
- QAR1(E)
- Vars
- Q(a);N_GUARD::B(D)
- R(b);N_GUARD::R1(A),XP(c)
- S(e);S_CUTR(b)::R1(A),XP(c)
- Refutation
- S(e);
- Try
- S(C);
- Threat
- DUALS(4)
- Vars
- S(e);XS(C)::R1(A),XP(c)
- S(e);::QAR1(E)
- Refutation
- R(b);XS(C)
- Try
- S(C);
- Threat
- QAR1(E)
- Vars
- Q(a);OGATE,XS(C)::B(D),XQ(a)
- R(b);N_GUARD::R1(A),XP(c)
- S(e);N_GUARD::QAB(E),XP(h)
- Refutation
- Q(a);
- Try
- S(C);XP(g)
- Threat
- DUALS(3)
- Vars
- S(e);::QAR1(E)
- Refutation
- P(h);XS(C)
- Try
- S(C);XP(h)
- Threat
- QAR1(E)
- Vars
- Q(a);N_GUARD::B(D)
- R(b);N_GUARD::R1(A),XP(c)
- S(e);S_CUTR(b)::R1(A),XP(c)
- Refutation
- S(e);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- S(e);::QAR1(E)
- Q(a);::QAR1(E)
- S(e);S_CUTR(b)::R1(A),XP(c)
- Refutation
- S(e);XS(C)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- Q(a);::QAR1(E)
- R(b);::QAR1(E)
- S(e);N_GUARD::R(G)
- Refutation
- S(e);XS(F)
- Try
- S(F);
- Threat
- QAR1(E)
- Vars
- Q(a);OGATE,XS(F)::B(D),XQ(a)
- S(e);N_GUARD::QAB(E),XP(h)
- S(e);N_GUARD,SBLOCK::QAB(E)
- Refutation
- Q(a);
- Try
- S(F);XP(h)
- Threat
- QAR1(E)
- Vars
- Q(a);N_GUARD::B(D)
- S(e);N_GUARD,SBLOCK::QAB(E)
- Refutation
- S(e);
- Try
- S(F);XP(i)
- Threat
- DUALS(3)
- Vars
- S(e);::B(D)
- Refutation
- S(e);XS(F)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- S(e);::S(F)
- Refutation
- S(e);
- Try
- Actual
- S(C);
- Threat
- DUALS(2)
- Vars
- P(i);OGATE,XS(C)::B(D),XP(i)
- S(e);::S(C)
- S(e);::QAR1(E)
- Q(a);N_GUARD::B(D)
- R(b);N_GUARD::R1(A),XP(c)
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