MESON Chess Problem Database
Problem Display
PID: 163190 (Nb1n4/1p6/1P1p4/1PPkpQ1p/4pR1P/1P6/2RpN3/3K4 w - - 0 1)
Amos, FJ
The Observer, 1925
(First published on Sun Mar 29 1925)
#2
11 + 9
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Ba7
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sc6
- 2.Qf7#
- 1...Se6
- 2.Qxe4#
- 1...Sf7
- 2.Qxf7#
- 1...e3
- 2.Rd4#
- 1...dxc5
- 2.Rxd2#
- 1...Ba7
- Tries
- 1.Sd4?
- threat
- 2.Qxe4#
- 1...Kxd4
- 2.Qxe4#
- 1...e3
- 2.Qe4#
- 1...dxc5!
- threat
- 1.Rc3?
- 1...Ba7
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sc6
- 2.Qf7#
- 1...Se6
- 2.Qxe4#
- 1...Sf7
- 2.Qxf7#
- 1...e3
- 2.Rd4#
- 1...dxc5!
- 1...Ba7
- 1.Rxe4?
- threat
- 2.Sf4#
- 2.Rd4#
- 1...dxc5
- 2.Rxd2#
- 1...Sc6
- 2.Sf4#
- 1...Se6!
- threat
- 1.Rg4?
- 1...dxc5
- 2.Rxd2#
- 1...Ba7
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sc6
- 2.Qf7#
- 1...Se6
- 2.Qxe4#
- 1...Sf7
- 2.Qxf7#
- 1...e3
- 2.Rd4#
- 1...hxg4!
- 1...dxc5
- 1.Qg6?
- 1...exf4
- 2.Qf5#
- 1...dxc5
- 2.Rxd2#
- 1...Se6
- 2.Qxe4#
- 1...Ba7
- 2.Sc7#
- 2.Qxd6#
- 1...Bc7
- 2.Sxc7#
- 1...Sc6
- 2.Qf7#
- 2.Qg8#
- 1...Sf7
- 2.Qxf7#
- 1...e3!
- 1...exf4
- 1.Qd7?
- 1...exf4
- 2.Qf5#
- 1...Se6
- 2.Qxb7#
- 1...Ba7
- 2.Sc7#
- 2.Qxd6#
- 1...Bc7
- 2.Sxc7#
- 1...Sc6
- 2.Qf7#
- 1...Sf7
- 2.Qxf7#
- 1...e3!
- 1...exf4
- 1.Qf7+?
- 1...Se6
- 2.Qxb7#
- 1...Sxf7!
- 1...Se6
- 1.b4?
- 1...Se6
- 2.Qxe4#
- 1...Ba7
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sc6
- 2.Qf7#
- 1...Sf7
- 2.Qxf7#
- 1...e3
- 2.Sc3#
- 2.Rd4#
- 1...dxc5!
- 1...Se6
- 1.c6?
- 1...Sxc6
- 2.Qf7#
- 1...Se6
- 2.Qxe4#
- 1...Ba7
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sf7
- 2.Qxf7#
- 1...e3
- 2.Rd4#
- 1...bxc6!
- 1...Sxc6
- 1.Sd4?
- Keys
- 1.Qc8!
- threat
- 2.Rxd2#
- 1...exf4
- 2.Qf5#
- 1...Se6
- 2.Qxb7#
- 1...Bc7
- 2.Sxc7#
- 1...Sc6
- 2.Qg8#
- 1...e3
- 2.Sc3#
- threat
- 1.Qc8!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- B(h);N_GUARD::S(K)
- B(h);N_GUARD::S(K),XB(h)
- S(i);N_GUARD::QAB(I)
- S(i);SBLOCK::QAB1(I),XP(b)
- S(i);N_GUARD::QAB(I),XS(i)
- P(b);OGATE::R1(E)
- P(f);SBLOCK,XP(H)::R(B),XP(a)
- Tries
- Try
- S(C);
- Threat
- QAB1(I),XP(b)
- Vars
- K(c);N_SPINP(d),P-FLIGHT,P_SPINP(b),XS(C)::QAR1(I),XP(b)
- P(b);::QAB1(I)
- Refutation
- P(f);XP(H)
- Try
- R(B);
- Vars
- B(h);N_GUARD::S(K)
- B(h);N_GUARD::S(K),XB(h)
- S(i);N_GUARD::QAB(I)
- S(i);SBLOCK::QAB1(I),XP(b)
- S(i);N_GUARD::QAB(I),XS(i)
- P(b);OGATE::R1(E)
- Refutation
- P(f);XP(H)
- Try
- R(E);XP(b)
- Threat
- DUALS(2)
- Vars
- P(f);SBLOCK,XP(H)::R(B),XP(a)
- S(i);::S(C)
- Refutation
- S(i);
- Try
- R(E);
- Vars
- P(f);SBLOCK,XP(H)::R(B),XP(a)
- B(h);N_GUARD::S(K)
- B(h);N_GUARD::S(K),XB(h)
- S(i);N_GUARD::QAB(I)
- S(i);SBLOCK::QAB1(I),XP(b)
- S(i);N_GUARD::QAB(I),XS(i)
- P(b);OGATE::R1(E)
- Refutation
- P(e);XR(E)
- Try
- Q(I);N_PINP(d)
- Vars
- P(d);OGATEB,XR(E)::QAR2(I)
- P(f);SBLOCK,XP(H)::R(B),XP(a)
- S(i);SBLOCK::QAB1(I),XP(b)
- B(h);N_GUARD::S(K),XB(h)
- S(i);N_GUARD::QAB(I),XS(i)
- Refutation
- P(b);
- Try
- Q(I);N_PINP(d),P_PINP(f)
- Vars
- P(d);OGATEB,XR(E)::QAR2(I)
- S(i);N_GUARD,SBLOCK::QAB(I),XP(g)
- B(h);N_GUARD::S(K),XB(h)
- S(i);N_GUARD::QAB(I)
- S(i);N_GUARD::QAB(I),XS(i)
- Refutation
- P(b);
- Try
- Q(I);CHECK,N_PINP(d)
- Vars
- S(i);N_GUARD,P_SPINS(i),SBLOCK::QAB(I),XP(g)
- Refutation
- S(i);XQ(I)
- Try
- P(D);
- Vars
- S(i);SBLOCK::QAB1(I),XP(b)
- B(h);N_GUARD::S(K)
- B(h);N_GUARD::S(K),XB(h)
- S(i);N_GUARD::QAB(I)
- S(i);N_GUARD::QAB(I),XS(i)
- Refutation
- P(f);XP(H)
- Try
- P(H);
- Vars
- S(i);N_GUARD,XP(H)::QAB(I)
- S(i);SBLOCK::QAB1(I),XP(b)
- B(h);N_GUARD::S(K)
- B(h);N_GUARD::S(K),XB(h)
- S(i);N_GUARD::QAB(I),XS(i)
- P(b);OGATE::R1(E)
- Refutation
- P(g);XP(H)
- Try
- Actual
- Q(I);N_PINP(d)
- Threat
- R(B),XP(a)
- Vars
- P(d);OGATEB,XR(E)::QAR2(I)
- S(i);N_GUARD,SBLOCK::QAB(I),XP(g)
- B(h);N_GUARD::S(K),XB(h)
- S(i);OGATE::QAB(I)
- P(b);::S(C)
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