MESON Chess Problem Database
Problem Display
PID: 21316 (4R1B1/4r1n1/1B2rN2/4kpK1/1Q2bp2/pN1pbp2/2n5/4R3 w - - 0 1)
Sheppard, Charles William
3rd HM.=, Good Companions (December), 1918
#2
8 + 12
| 3391 | Het Half Pin Thema | 1947 |
SOLUTION
- SOUND
- Sets
- 1...Rxb6
- 2.Sd7#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Bxc7#
- 1...Bc1
- 2.Qc5#
- 1...Bd2
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Bd5
- 2.Qxf4#
- 1...Bc6
- 2.Qxf4#
- 1...Bb7
- 2.Qxf4#
- 1...Ba8
- 2.Qxf4#
- 1...Rxb6
- Tries
- 1.Sa5?
- threat
- 2.Sc4#
- 1...Rxb6
- 2.Sd7#
- 1...Bc5
- 2.Qxc5#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Bxc7#
- 1...Bd5
- 2.Qxf4#
- 1...Bxb6!
- threat
- 1.Bc7+?
- 1...Rd6
- 2.Sd7#
- 2.Bxd6#
- 2.Qxd6#
- 1...Rxc7!
- 1...Rd6
- 1.Qa5+?
- 1...Bc5
- 2.Qxc5#
- 1...Bd5
- 2.Qxd5#
- 1...Kd6!
- 1...Bc5
- 1.Qc5+?
- 1...Bd5
- 2.Qxd5#
- 1...Bxc5!
- 1...Bd5
- 1.Qxe7?
- threat
- 2.Bc7#
- 2.Qc7#
- 1...Rxe7
- 2.Bc7#
- 1...Sxe8
- 2.Qxe6#
- 1...Bc5
- 2.Qxc5#
- 1...Bxb6!
- threat
- 1.Qxe4+?
- 1...Kd6
- 2.Qd5#
- 1...fxe4!
- 1...Kd6
- 1.Qb5+?
- 1...Bc5
- 2.Qxc5#
- 1...Bd5
- 2.Qxd5#
- 1...Kd6!
- 1...Bc5
- 1.Sa5?
- Keys
- 1.Sd2!
- threat
- 2.Sc4#
- 1...Rxb6
- 2.Sd7#
- 1...Bxd2
- 2.Qc5#
- 1...Bxb6
- 2.Sxf3#
- 1...Bc5
- 2.Qxc5#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Bxc7#
- 1...Bd5
- 2.Qxf4#
- threat
- 1.Sd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- R(j);P_SPINR(k),XB(E)::S(F)
- R(j);P_SPINR(k)::S(F)
- R(k);N_GUARD,P_SPINR(j)::B(E),XR(k)
- B(d);N_GUARD,P_SPINB(f)::QAR2(C)
- B(d);N_GUARD,P_SPINB(f)::QAR2(C),XB(d)
- B(f);OGATE,P_SPINB(d)::QAB1(C),XP(g)
- Tries
- Try
- S(B);
- Threat
- S(B)
- Vars
- R(j);P_SPINR(k),XB(E)::S(F)
- B(d);N_GUARD,P_SPINB(f)::QAR2(C),XB(d)
- R(j);P_SPINR(k)::S(F)
- R(k);N_GUARD,P_SPINR(j)::B(E),XR(k)
- B(f);OGATE,P_SPINB(d)::QAB1(C),XP(g)
- Refutation
- B(d);P_SPINB(f),XB(E)
- Try
- B(E);CHECK
- Refutation
- R(k);P_SPINR(j),XB(E)
- Try
- Q(C);CHECK
- Vars
- B(d);N_GUARD,P_SPINB(f)::QAR2(C),XB(d)
- B(f);N_GUARD,P_SPINB(d)::QAR1(C),XB(f)
- Refutation
- K(h);S_FLIGHT
- Try
- Q(C);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(d)::QAR1(C),XB(f)
- Refutation
- B(d);P_SPINB(f),XQ(C)
- Try
- Q(C);P_PINR(j),XR(k)
- Threat
- DUALS(2)
- Vars
- R(j);XQ(C)::B(E)
- S(l);N_GUARD,XR(G)::QAR1(C),XR(j)
- B(d);N_GUARD,P_SPINB(f)::QAR2(C),XB(d)
- Refutation
- B(d);P_SPINB(f),XB(E)
- Try
- Q(C);CHECK,XB(f)
- Vars
- K(h);S_FLIGHT::QAR1(C)
- Refutation
- P(i);XQ(C)
- Try
- Q(C);CHECK
- Vars
- B(d);N_GUARD,P_SPINB(f)::QAR2(C),XB(d)
- B(f);N_GUARD,P_SPINB(d)::QAR1(C),XB(f)
- Refutation
- K(h);S_FLIGHT
- Try
- Actual
- S(B);
- Threat
- S(B)
- Vars
- R(j);P_SPINR(k),XB(E)::S(F)
- B(d);N_GUARD,P_SPINB(f),XS(B)::QAR2(C)
- B(d);P_SPINB(f),XB(E)::S(B),XP(e)
- B(d);N_GUARD,P_SPINB(f)::QAR2(C),XB(d)
- R(j);P_SPINR(k)::S(F)
- R(k);N_GUARD,P_SPINR(j)::B(E),XR(k)
- B(f);OGATE,P_SPINB(d)::QAB1(C),XP(g)
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