MESON Chess Problem Database
Problem Display
PID: 1019 (8/1B1N3R/1P1k4/1r3Pp1/r2n2K1/2nQ4/3N1b2/3R4 w - - 0 1)
Rice, John Michael
The Problemist Supplement, 1996
#2
9 + 7
| 35 | L'Italia Scacchistica | 1998 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sc4#
- 1...Ra2
- 2.Sc4#
- 1...Ra3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Raa5
- 2.Sc4#
- 1...Ra6
- 2.Sc4#
- 1...Ra7
- 2.Sc4#
- 1...Ra8
- 2.Sc4#
- 1...Sb1
- 2.Se4#
- 1...Sxd1
- 2.Se4#
- 1...Sa2
- 2.Se4#
- 1...Se2
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sd5
- 2.Se4#
- 1...Ra1
- Tries
- 1.Qe2?
- threat
- 2.Qe7#
- 1...Sc2+
- 2.Sc4#
- 2.Se4#
- 1...Sdxe2+
- 2.Sc4#
- 2.Se4#
- 1...Sb3+
- 2.Sc4#
- 2.Se4#
- 1...Sf3+
- 2.Sc4#
- 2.Se4#
- 1...Sxf5+
- 2.Sc4#
- 1...Sc6+
- 2.Sc4#
- 2.Se4#
- 1...Se6+
- 2.Sc4#
- 2.Se4#
- 1...Rxb6
- 2.Qe5#
- 1...Scxe2
- 2.Se4#
- 1...Re5
- 2.Qxe5#
- 1...Se4
- 2.Sxe4#
- 1...Sd5
- 2.Se4#
- 2.Qe5#
- 1...Be3!
- threat
- 1.Qc4?
- threat
- 2.Qc7#
- 1...Rxc4
- 2.Sxc4#
- 1...Rxb6
- 2.Qc5#
- 1...Sxf5
- 2.Se4#
- 1...Rc5
- 2.Qxc5#
- 1...Sd5
- 2.Se4#
- 1...Sc2
- 2.Se4#
- 1...Sde2
- 2.Se4#
- 1...Sb3
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc6
- 2.Se4#
- 1...Se6
- 2.Se4#
- 1...Rxf5!
- threat
- 1.Qxb5?
- threat
- 2.Qc5#
- 2.Qe5#
- 1...Sc2+
- 2.Sc4#
- 2.Se4#
- 1...Sde2+
- 2.Sc4#
- 2.Se4#
- 1...Sb3+
- 2.Sc4#
- 2.Se4#
- 1...Sf3+
- 2.Sc4#
- 2.Se4#
- 1...Sdxb5+
- 2.Sc4#
- 2.Se4#
- 1...Sc6+
- 2.Sc4#
- 2.Se4#
- 1...Se6+
- 2.Sc4#
- 2.Se4#
- 1...Scxb5
- 2.Se4#
- 1...Rc4
- 2.Sxc4#
- 2.Qe5#
- 1...Ra5
- 2.Sc4#
- 1...Bg3
- 2.Qc5#
- 1...Se4
- 2.Sxe4#
- 2.Qd5#
- 2.Qe5#
- 1...Sd5
- 2.Se4#
- 2.Qc5#
- 2.Qxd5#
- 1...Sxf5+!
- threat
- 1.Qe3?
- threat
- 2.Qe7#
- 1...Sc2+
- 2.Sc4#
- 2.Se4#
- 1...Sde2+
- 2.Sc4#
- 2.Se4#
- 1...Sb3+
- 2.Sc4#
- 2.Se4#
- 1...Sf3+
- 2.Sc4#
- 2.Se4#
- 1...Sxf5+
- 2.Sc4#
- 1...Sc6+
- 2.Sc4#
- 2.Se4#
- 1...Se6+
- 2.Sc4#
- 2.Se4#
- 1...Rxb6
- 2.Qe5#
- 1...Re5
- 2.Qxe5#
- 1...Se4
- 2.Sxe4#
- 1...Sd5
- 2.Se4#
- 2.Qe5#
- 1...Bxe3!
- threat
- 1.Qg3+?
- 1...Re5
- 2.Qxe5#
- 1...Bxg3!
- 1...Re5
- 1.Qe2?
- Keys
- 1.Qe4!
- threat
- 2.Qe7#
- 1...Rxb6
- 2.Qe5#
- 1...Sxe4
- 2.Sxe4#
- 1...Sxf5
- 2.Sc4#
- 1...Re5
- 2.Qxe5#
- 1...Sd5
- 2.Qe5#
- 1...Sc2
- 2.Sc4#
- 1...Sde2
- 2.Sc4#
- 1...Sb3
- 2.Sc4#
- 1...Sf3
- 2.Sc4#
- 1...Sc6
- 2.Sc4#
- 1...Se6
- 2.Sc4#
- threat
- 1.Qe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 9
- REMOVED MATES = 12
- Sets
- R(c);N_GUARD::S(B)
- R(c);N_GUARD::S(B),XR(c)
- S(b);N_GUARD::S(B)
- S(b);N_GUARD,XR(A)::S(B)
- S(b);N_GUARD::S(B),XS(b)
- S(b);N_GUARD,N_SPINS(d)::S(B)
- Tries
- Try
- Q(C);N_PINS(d)
- Threat
- QAB1(C)
- Vars
- S(d);CHECK,XP(E)::R(A)+S(B),DCHECK
- R(e);N_GUARD,XP(F)::QAB1(C)
- S(b);N_GUARD,XQ(C)::S(B)
- R(e);N_GUARD::QAB1(C),XR(e)
- S(b);N_GUARD::S(B),XS(b)
- Refutation
- B(a);
- Try
- Q(C);N_PINS(d)
- Threat
- QAB1(C)
- Vars
- R(c);XQ(C)::S(B),XR(c)
- R(e);N_GUARD,XP(F)::QAB1(C)
- S(d);P_PINQ(C),XP(E)::R(A)+S(B),DCHECK
- R(e);N_GUARD::QAB1(C),XR(e)
- S(b);N_GUARD::S(B)
- S(d);P_PINQ(C)::R(A)+S(B),DCHECK
- Refutation
- R(e);XP(E)
- Try
- Q(C);N_PINS(d),XR(e)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,XQ(C)::S(B)
- R(c);N_GUARD::S(B)
- B(a);::QAB1(C)
- Refutation
- S(d);CHECK,XP(E)
- Try
- Q(C);N_PINS(d)
- Threat
- QAB1(C)
- Vars
- S(d);CHECK,XP(E)::R(A)+S(B),DCHECK
- R(e);N_GUARD,XP(F)::QAB1(C)
- R(e);N_GUARD::QAB1(C),XR(e)
- S(b);N_GUARD::S(B),XS(b)
- Refutation
- B(a);XQ(C)
- Try
- Q(C);CHECK,N_PINS(d)
- Vars
- R(e);N_GUARD,P_SPINR(e)::QAB1(C),XR(e)
- Refutation
- B(a);XQ(C)
- Try
- Actual
- Q(C);N_PINS(d)
- Threat
- QAB1(C)
- Vars
- R(e);N_GUARD,XP(F)::QAB1(C)
- S(b);XQ(C)::S(B),XS(b)
- S(d);P_PINQ(C),XP(E)::R(A)+S(B),DCHECK
- R(e);N_GUARD::QAB1(C),XR(e)
- S(b);S_CUTR(e)::QAB1(C)
- S(d);P_PINQ(C)::R(A)+S(B),DCHECK
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