MESON Chess Problem Database
Problem Display
PID: 102054 (2BR2n1/5R2/2p2p2/2p1k2p/4p2P/p2Pp1K1/P6Q/5b2 w - - 0 1)
Lazard, Frederic
HM., The Observer, 1920
(First published on Sun Sep 5 1920)
#2
8 + 10
| 6490 | yacpdb | 2009 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Be2
- 2.Kg2#
- 2.Kh3#
- 1...Bg2
- 2.Kxg2#
- 1...Bxd3
- 2.Kg2#
- 2.Kh3#
- 1...Bh3
- 2.Kxh3#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...e2
- 2.Kf2#
- 1...exd3
- 2.Kf3#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxf5#
- 1...Be2
- Tries
- 1.Ra7?
- 1...Bxd3
- 2.Kg2#
- 2.Kh3#
- 1...exd3
- 2.Kf3#
- 1...Be2
- 2.Kg2#
- 2.Kh3#
- 1...Bg2
- 2.Kxg2#
- 1...Bh3
- 2.Kxh3#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...e2
- 2.Kf2#
- 1...c4
- 2.d4#
- 1...f5!
- 1...Bxd3
- 1.Rb7?
- 1...Bxd3
- 2.Kg2#
- 2.Kh3#
- 1...exd3
- 2.Kf3#
- 1...Be2
- 2.Kg2#
- 2.Kh3#
- 1...Bg2
- 2.Kxg2#
- 1...Bh3
- 2.Kxh3#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...e2
- 2.Kf2#
- 1...c4
- 2.d4#
- 1...f5!
- 1...Bxd3
- 1.Rc7?
- 1...Bxd3
- 2.Kg2#
- 2.Kh3#
- 1...exd3
- 2.Kf3#
- 1...Be2
- 2.Kg2#
- 2.Kh3#
- 1...Bg2
- 2.Kxg2#
- 1...Bh3
- 2.Kxh3#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...e2
- 2.Kf2#
- 1...c4
- 2.d4#
- 1...f5!
- 1...Bxd3
- 1.Rg7?
- 1...Bxd3
- 2.Kg2#
- 2.Kh3#
- 1...exd3
- 2.Kf3#
- 1...Be2
- 2.Kg2#
- 2.Kh3#
- 1...Bg2
- 2.Kxg2#
- 1...Bh3
- 2.Kxh3#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...e2
- 2.Kf2#
- 1...c4
- 2.d4#
- 1...f5!
- 1...Bxd3
- 1.Rh7?
- 1...Bxd3
- 2.Kg2#
- 2.Kh3#
- 1...exd3
- 2.Kf3#
- 1...Be2
- 2.Kg2#
- 2.Kh3#
- 1...Bg2
- 2.Kxg2#
- 1...Bh3
- 2.Kxh3#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...e2
- 2.Kf2#
- 1...c4
- 2.d4#
- 1...f5!
- 1...Bxd3
- 1.Rff8?
- 1...Bxd3
- 2.Kg2#
- 2.Kh3#
- 1...exd3
- 2.Kf3#
- 1...Be2
- 2.Kg2#
- 2.Kh3#
- 1...Bg2
- 2.Kxg2#
- 1...Bh3
- 2.Kxh3#
- 1...Sh6
- 2.Rfe8#
- 1...e2
- 2.Kf2#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxf5#
- 1...Se7!
- 1...Bxd3
- 1.Qh1?
- threat
- 2.Qxe4#
- 1...Bxd3
- 2.Qa1#
- 1...Bg2
- 2.Qa1#
- 1...f5
- 2.Rxf5#
- 1...exd3!
- threat
- 1.Qc2?
- threat
- 2.Qc3#
- 2.Qxc5#
- 1...Se7
- 2.Rxe7#
- 2.Qc3#
- 1...c4
- 2.Qc3#
- 2.d4#
- 1...exd3!
- threat
- 1.Qd2?
- threat
- 2.Qc3#
- 1...exd3
- 2.Qxe3#
- 1...exd2!
- threat
- 1.Qf2?
- threat
- 2.Qf4#
- 2.Qf5#
- 1...Se7
- 2.Rxe7#
- 2.Qf4#
- 2.Qxf6#
- 1...Bh3
- 2.Qf4#
- 1...Sh6
- 2.Re7#
- 2.Qf4#
- 2.Qxf6#
- 1...f5
- 2.Rxf5#
- 2.Qf4#
- 2.Qxf5#
- 1...exf2!
- threat
- 1.Qh3?
- threat
- 2.Qf5#
- 2.Qe6#
- 1...Se7
- 2.Rxe7#
- 2.Qe6#
- 1...Sh6
- 2.Re7#
- 2.Qe6#
- 1...f5
- 2.Rxf5#
- 2.Qxf5#
- 1...Bxh3!
- threat
- 1.Ra7?
- Keys
- 1.Qg1!
- 1...Bxd3
- 2.Qa1#
- 1...exd3
- 2.Qxe3#
- 1...Se7
- 2.Rxe7#
- 1...Be2
- 2.Qa1#
- 1...Bg2
- 2.Qa1#
- 1...Bh3
- 2.Qa1#
- 1...Sh6
- 2.Re7#
- 1...e2
- 2.Qxc5#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxf5#
- 1...Bxd3
- 1.Qg1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(a);::QAB(B)+K(D),XB(a)
- S(j);N_GUARD::R(F)
- S(j);N_GUARD::R(F),XS(j)
- P(c);::QAB(B)+K(D)
- P(d);XP(C)::QAB(B)+K(D)
- P(e);N_GUARD::P(C)
- P(i);OGATE::R1(F),XP(i)
- Tries
- Try
- R(F);
- Vars
- P(d);XP(C)::QAB(B)+K(D)
- B(a);::QAB(B)+K(D),XB(a)
- S(j);N_GUARD::R(F)
- S(j);N_GUARD::R(F),XS(j)
- P(c);::QAB(B)+K(D)
- P(e);N_GUARD::P(C)
- Refutation
- P(i);
- Try
- R(F);
- Vars
- P(d);XP(C)::QAB(B)+K(D)
- B(a);::QAB(B)+K(D),XB(a)
- S(j);N_GUARD::R(F)
- S(j);N_GUARD::R(F),XS(j)
- P(c);::QAB(B)+K(D)
- P(e);N_GUARD::P(C)
- Refutation
- P(i);
- Try
- R(F);
- Vars
- P(d);XP(C)::QAB(B)+K(D)
- B(a);::QAB(B)+K(D),XB(a)
- S(j);N_GUARD::R(F)
- S(j);N_GUARD::R(F),XS(j)
- P(c);::QAB(B)+K(D)
- P(e);N_GUARD::P(C)
- Refutation
- P(i);
- Try
- R(F);
- Vars
- P(d);XP(C)::QAB(B)+K(D)
- B(a);::QAB(B)+K(D),XB(a)
- S(j);N_GUARD::R(F)
- S(j);N_GUARD::R(F),XS(j)
- P(c);::QAB(B)+K(D)
- P(e);N_GUARD::P(C)
- Refutation
- P(i);
- Try
- R(F);
- Vars
- P(d);XP(C)::QAB(B)+K(D)
- B(a);::QAB(B)+K(D),XB(a)
- S(j);N_GUARD::R(F)
- S(j);N_GUARD::R(F),XS(j)
- P(c);::QAB(B)+K(D)
- P(e);N_GUARD::P(C)
- Refutation
- P(i);
- Try
- R(F);
- Vars
- P(d);XP(C)::QAB(B)+K(D)
- B(a);::QAB(B)+K(D),XB(a)
- S(j);N_GUARD::R(F)
- P(c);::QAB(B)+K(D)
- P(e);N_GUARD::P(C)
- P(i);OGATE::R1(F),XP(i)
- Refutation
- S(j);
- Try
- Q(B);
- Threat
- QAR1(B),XP(d)
- Vars
- B(a);OGATE,XP(C)::QAB(B)
- B(a);OGATE::QAB(B)
- P(i);OGATE::R1(F),XP(i)
- Refutation
- P(d);XP(C)
- Try
- Q(B);
- Threat
- DUALS(2)
- Refutation
- P(d);XP(C)
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- P(d);OGATEB,XP(C)::QAR2(B),XP(c)
- Refutation
- P(c);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(a);::QAB1(B)
- Refutation
- P(c);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(2)
- Refutation
- B(a);XQ(B)
- Try
- Actual
- Q(B);
- Vars
- B(a);OGATE,XP(C)::QAB(B)
- P(d);OGATEB,XP(C)::QAR2(B),XP(c)
- S(j);N_GUARD::R(F),XS(j)
- B(a);OGATE::QAB(B)
- S(j);N_GUARD::R(F)
- P(c);OGATE::QAR2(B),XP(e)
- P(e);N_GUARD::P(C)
- P(i);OGATE::R1(F),XP(i)
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