MESON Chess Problem Database
Problem Display
PID: 16311 (2Q3K1/1p4p1/pBBP2rb/P5P1/2k1N3/P7/bP1Pp3/2Nrq3 w - - 0 1)
Alexander, Frederick Forrest Lawrie
Chess, 1940
#2
12 + 10
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Rxd6
- 2.Sxd6#
- 1...Re6
- 2.Qxe6#
- 1...Bb1
- 2.b3#
- 1...bxc6
- 2.Qxc6#
- 1...Rxd6
- Tries
- 1.Sc3?
- threat
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 2.Qg4#
- 1...Qxd2
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 1...Rxd2
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 1...Rxg5
- 2.Bb5#
- 2.Bd5#
- 1...Rxd6
- 2.Bb5#
- 2.Bd5#
- 1...Bxg5
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 1...bxc6
- 2.Qg4#
- 2.Qxa6#
- 2.Qxc6#
- 1...Qf2
- 2.Bb5#
- 2.Bd5#
- 1...Qg3
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 1...Qh4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 1...Qf1
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 1...Qg1
- 2.Bb5#
- 2.Bd5#
- 1...Qh1
- 2.Bxh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 1...Re6
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 2.Qxe6#
- 1...Rf6
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 1...Bb1
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bb5#
- 2.Bd5#
- 2.Bxb7#
- 2.Bd7#
- 2.Be8#
- 2.b3#
- 1...Rxc1!
- threat
- 1.Bb5+?
- 1...Kd5
- 2.Qf5#
- 1...Kxb5+!
- 1...Kd5
- 1.Bd5+?
- 1...Kb5
- 2.Sc3#
- 2.Qd7#
- 2.Qe8#
- 1...Kxd5!
- 1...Kb5
- 1.Qf5?
- threat
- 2.Qc5#
- 2.Qd5#
- 1...Qxd2
- 2.Qc5#
- 1...Rxc1
- 2.Qd5#
- 1...Rxd2
- 2.Qc5#
- 1...Rxd6
- 2.Sxd6#
- 2.Qc5#
- 1...bxc6
- 2.Qc5#
- 1...Qf2
- 2.Qd5#
- 1...Qg1
- 2.Qd5#
- 1...Rxg5!
- threat
- 1.Sc3?
- Keys
- 1.Qg4!
- threat
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sf6#
- 1...Qxd2
- 2.Sxd2#
- 1...Rxc1
- 2.Sc5#
- 1...Rxd2
- 2.Sxd2#
- 1...Rxg5
- 2.Sxg5#
- 1...Rxd6
- 2.Sxd6#
- 1...Bxg5
- 2.Sxg5#
- 1...bxc6
- 2.Sc3#
- 1...Qf2
- 2.Sxf2#
- 1...Qg3
- 2.Sxg3#
- 1...Qh4
- 2.Qxe2#
- 1...Qf1
- 2.Sf2#
- 1...Qg1
- 2.Qxe2#
- 1...Qh1
- 2.Qxe2#
- 1...Re6
- 2.Qxe6#
- 1...Rf6
- 2.Sxf6#
- 1...Bb1
- 2.b3#
- threat
- 1.Qg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 12
- REMOVED MATES = 0
- Sets
- R(g);XP(J)::S(E),XR(g)
- R(g);N_GUARD::QAB(K),XR(g)
- B(c);N_GUARD::P(B)
- P(i);OGATE,P_SPINP(i),XB(I)::QAR2(K),XP(i)
- Tries
- Try
- S(E);
- Threat
- DUALS(11)
- Refutation
- R(a);XS(A)
- Try
- B(I);CHECK
- Vars
- K(e);S_FLIGHT::QAR2(K)
- Refutation
- K(e);CHECK,S_FLIGHT,XB(I)
- Try
- B(I);CHECK
- Refutation
- K(e);S_FLIGHT,XB(I)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- Q(b);XP(C)::QAR1(K)
- R(a);XS(A)::QAB1(K)
- R(a);XP(C)::QAR1(K)
- P(i);XB(I)::QAR1(K)
- Q(b);::QAB1(K)
- Refutation
- R(g);XP(G)
- Try
- Actual
- Q(K);
- Threat
- DUALS(5)
- Vars
- Q(b);XP(C)::QAR(K)+S(E),DCHECK,XQ(b)
- R(a);XS(A)::QAR(K)+S(E)
- R(a);XP(C)::QAR(K)+S(E),DCHECK,XR(a)
- R(g);XP(G)::QAR(K)+S(E),XR(g)
- R(g);XP(J)::QAR(K)+S(E),DCHECK,XR(g)
- B(h);XP(G)::QAR(K)+S(E),XB(h)
- P(i);XB(I)::QAR(K)+S(E)
- Q(b);::QAR(K)+S(E),XQ(b)
- Q(b);N_GUARD::QAB(K),XP(d)
- Q(b);::QAR(K)+S(E)
- R(g);N_GUARD::QAB(K),XR(g)
- R(g);::QAR(K)+S(E),XR(g)
- B(c);N_GUARD::P(B)
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