MESON Chess Problem Database
Problem Display
PID: 199647 (N6B/3P1b2/1R4pn/b1kNp3/Kp3Q1R/pp3B2/3r4/2q5 w - - 0 1)
Shifrin, Semion
Variantim, 1995
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Qc4#
- 1...Qa1
- 2.Qc4#
- 1...Qb1
- 2.Qc4#
- 1...Qd1
- 2.Qc4#
- 1...Qe1
- 2.Qc4#
- 1...Qg1
- 2.Qc4#
- 1...Qh1
- 2.Qc4#
- 1...Qc4
- 2.Qxc4#
- 1...Rxd5
- 2.Qxc1#
- 1...Bxd5
- 2.Qf8#
- 1...Be6
- 2.Qf8#
- 1...Be8
- 2.Qf8#
- 1...Bg8
- 2.Qf8#
- 1...Qb2
- Tries
- 1.Se3?
- threat
- 2.Rc6#
- 1...Bxb6
- 2.Qxb4#
- 1...Rd6
- 2.Rb5#
- 1...Bd5
- 2.Qf8#
- 1...e4
- 2.Qc7#
- 1...Rd5!
- threat
- 1.Sxb4?
- threat
- 2.Sa6#
- 2.Rc6#
- 1...Bxb4
- 2.Rc6#
- 2.Qxb4#
- 1...exf4
- 2.Rc6#
- 1...Rd4
- 2.Rc6#
- 1...e4
- 2.Rc6#
- 2.Qc7#
- 1...Qf1
- 2.Rc6#
- 1...Qc4
- 2.Rc6#
- 1...Rd6
- 2.Sa6#
- 2.Rb5#
- 1...Bc4
- 2.Rc6#
- 1...Bd5
- 2.Sa6#
- 2.Qf8#
- 1...Bxb6!
- threat
- 1.Sdc7?
- threat
- 2.Sa6#
- 2.Rc6#
- 1...Bxb6
- 2.Qxb4#
- 1...exf4
- 2.Rc6#
- 1...Rd4
- 2.Rc6#
- 1...Qf1
- 2.Rc6#
- 1...Qc4
- 2.Rc6#
- 1...Rd5
- 2.Sa6#
- 2.Qxc1#
- 1...Rd6
- 2.Sa6#
- 2.Rb5#
- 1...Bc4
- 2.Rc6#
- 1...Bd5
- 2.Sa6#
- 2.Qf8#
- 1...e4!
- threat
- 1.Se7?
- threat
- 2.Rc6#
- 1...Bxb6
- 2.Qxb4#
- 1...Rd6
- 2.Rb5#
- 1...Bd5!
- threat
- 1.Qxe5?
- threat
- 2.Qd6#
- 2.Qc7#
- 2.Qe7#
- 1...Rxd5
- 2.Qc7#
- 1...Bxd5
- 2.Qd6#
- 2.Qe7#
- 1...Rd4
- 2.Qxd4#
- 2.Qc7#
- 1...Sg4
- 2.Qc7#
- 1...Qe1
- 2.Qd6#
- 2.Qc7#
- 1...Re2
- 2.Qd4#
- 2.Qd6#
- 2.Qc7#
- 1...Be6
- 2.Qd6#
- 2.Qc7#
- 1...Sf5
- 2.Qc7#
- 1...Sg8
- 2.Qd6#
- 2.Qc7#
- 1...Bxb6!
- threat
- 1.Qf6?
- threat
- 2.Rb5#
- 2.Rc6#
- 2.Qe7#
- 2.Qc6#
- 2.Qd6#
- 1...Rxd5
- 2.Rb5#
- 2.Rc6#
- 2.Qc6#
- 1...Bxb6
- 2.Qxb6#
- 1...Bxd5
- 2.Rb5#
- 2.Qe7#
- 2.Qd6#
- 2.Qf8#
- 1...Rd4
- 2.Rc6#
- 2.Qc6#
- 1...e4
- 2.Qc6#
- 1...Qf1
- 2.Rc6#
- 2.Qe7#
- 2.Qc6#
- 2.Qd6#
- 1...Qc4
- 2.Rc6#
- 2.Qe7#
- 2.Qc6#
- 2.Qd6#
- 1...Be6
- 2.Qe7#
- 2.Qf8#
- 1...Sf5
- 2.Rb5#
- 2.Rc6#
- 2.Qc6#
- 1...Sg8
- 2.Rb5#
- 2.Rc6#
- 2.Qc6#
- 2.Qd6#
- 1...Sg4!
- threat
- 1.d8Q?
- threat
- 2.Qc7#
- 2.Qe7#
- 2.Qd6#
- 2.Qc8#
- 2.Qf8#
- 1...Rxd5
- 2.Qxc1#
- 2.Qc7#
- 2.Qc8#
- 1...Bxb6
- 2.Qxb6#
- 1...Bxd5
- 2.Qe7#
- 2.Qff8#
- 2.Qd6#
- 2.Qdf8#
- 1...exf4
- 2.Qc7#
- 2.Qc8#
- 1...Rd4
- 2.Qc7#
- 2.Qc8#
- 1...e4
- 2.Qfc7#
- 1...Be6
- 2.Qc7#
- 2.Qe7#
- 2.Qff8#
- 2.Qd6#
- 2.Qdf8#
- 1...Sf5
- 2.Qc7#
- 2.Qc8#
- 1...Sg8
- 2.Qc7#
- 2.Qd6#
- 2.Qc8#
- 1...Be8+!
- threat
- 1.Se3?
- Keys
- 1.Sc3!
- threat
- 2.Rc6#
- 1...Bxb6
- 2.Qxb4#
- 1...e4
- 2.Qc7#
- 1...Rd5
- 2.Qc4#
- 1...Rd6
- 2.Rb5#
- 1...Bd5
- 2.Qf8#
- threat
- 1.Sc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- Q(a);N_GUARD::QAR1(C)
- Q(a);N_GUARD::QAR1(C),XQ(a)
- R(b);OGATE,XS(E)::QAR(C),XQ(a)
- B(k);OGATE,XS(E)::QAB(C)
- B(k);OGATE::QAB(C)
- B(k);OGATE,P_PINP(G)::QAB(C)
- Tries
- Try
- S(E);
- Threat
- R1(F)
- Vars
- B(f);N_GUARD,XR(F)::QAB1(C),XP(e)
- R(b);SBLOCK::R1(F)
- B(k);OGATE::QAB(C)
- P(h);OGATE::QAR2(C)
- Refutation
- R(b);
- Try
- S(E);XP(e)
- Threat
- DUALS(2)
- Vars
- P(h);XQ(C)::R1(F)
- R(b);P_PINS(E)::R1(F)
- Q(a);::R1(F)
- Q(a);P_PINS(E)::R1(F)
- B(k);::R1(F)
- Refutation
- B(f);XR(F)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- B(f);N_GUARD,XR(F)::QAB1(C),XP(e)
- P(h);XQ(C)::R1(F)
- R(b);::R1(F)
- Q(a);::R1(F)
- B(k);::R1(F)
- Refutation
- P(h);
- Try
- S(E);
- Threat
- R1(F)
- Vars
- B(f);N_GUARD,XR(F)::QAB1(C),XP(e)
- R(b);SBLOCK::R1(F)
- Refutation
- B(k);
- Try
- Q(C);XP(h)
- Threat
- DUALS(3)
- Vars
- R(b);P_SPINR(b),XS(E)::QAR2(C)
- S(j);::QAR2(C)
- Refutation
- B(f);XR(F)
- Try
- Q(C);
- Threat
- DUALS(5)
- Vars
- B(f);OGATE,XR(F)::QAB1(C),XB(f)
- P(h);::QAR1(C)
- Refutation
- S(j);
- Try
- P(G);
- Threat
- DUALS(5)
- Vars
- B(f);OGATE,XR(F)::QAB1(G),XB(f)
- P(h);OGATE::QAR2(C)
- Refutation
- B(k);CHECK
- Try
- Actual
- S(E);
- Threat
- R1(F)
- Vars
- B(f);N_GUARD,XR(F)::QAB1(C),XP(e)
- P(h);OGATE::QAR2(C)
- R(b);S_CUTB(k)::QAR1(C)
- R(b);SBLOCK::R1(F)
- B(k);OGATE::QAB(C)
Developed and maintained by Brian Stephenson.
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