MESON Chess Problem Database
Problem Display
PID: 230193 (4n3/4n3/3p4/6QN/2ppk3/1N1qp3/1p5b/1B1R1R1K w - - 0 1)
Dewfall, EJ
Sunday Chronicle, 1948
(First published on Sun Apr 18 1948)
#2
7 + 10
| 15239 | Valois Notebooks | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxb1
- 2.Rxd4#
- 1...Qc2
- 2.Rxd4#
- 1...Bg1
- 2.Sg3#
- 2.Rf4#
- 1...Bg3
- 2.Sxg3#
- 1...Bf4
- 2.Rxf4#
- 1...Be5
- 2.Qg2#
- 1...Sd5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...Sg6
- 2.Qf5#
- 1...Sc8
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e2
- 2.Sd2#
- 1...cxb3
- 2.Bxd3#
- 1...c3
- 2.Bxd3#
- 1...d5
- 2.Sc5#
- 1...Qxb1
- Tries
- 1.Kxh2?
- threat
- 2.Sg3#
- 2.Rf4#
- 1...Sf5
- 2.Qxf5#
- 1...Sd5
- 2.Sg3#
- 2.Qf5#
- 1...Sg6
- 2.Sg3#
- 2.Qf5#
- 1...e2
- 2.Sd2#
- 2.Sg3#
- 1...Qc2+!
- threat
- 1.Rxd3?
- threat
- 2.Rxe3#
- 2.Rxd4#
- 1...cxb3
- 2.Rxe3#
- 1...Be5
- 2.Rxd4#
- 2.Qg2#
- 1...Sf5
- 2.Qxf5#
- 1...Bf4
- 2.Rxf4#
- 2.Rxd4#
- 1...e2
- 2.Sd2#
- 2.Re3#
- 2.Rxd4#
- 1...cxd3!
- threat
- 1.Rf2?
- 1...exf2
- 2.Sd2#
- 1...cxb3
- 2.Bxd3#
- 1...Be5
- 2.Qg2#
- 1...Sf5
- 2.Qxf5#
- 1...Qc2
- 2.Rxd4#
- 1...Bg1
- 2.Sg3#
- 2.Rf4#
- 1...Bg3
- 2.Sxg3#
- 1...Bf4
- 2.Rxf4#
- 1...Sd5
- 2.Qf5#
- 1...Sc6
- 2.Qf5#
- 1...Sg6
- 2.Qf5#
- 1...Sc8
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e2
- 2.Sd2#
- 1...c3
- 2.Bxd3#
- 1...d5
- 2.Sc5#
- 1...Qxb1!
- 1...exf2
- 1.Kxh2?
- Keys
- 1.Rd2!
- 1...Qxb1
- 2.Rxd4#
- 1...exd2
- 2.Sxd2#
- 1...cxb3
- 2.Bxd3#
- 1...Be5
- 2.Qg2#
- 1...Sf5
- 2.Qxf5#
- 1...Qc2
- 2.Rxd4#
- 1...Bg1
- 2.Sg3#
- 2.Rf4#
- 1...Bg3
- 2.Sxg3#
- 1...Bf4
- 2.Rxf4#
- 1...Sd5
- 2.Qf5#
- 1...Sc6
- 2.Qf5#
- 1...Sg6
- 2.Qf5#
- 1...Sc8
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e2
- 2.Rxe2#
- 1...c3
- 2.Bxd3#
- 1...d5
- 2.Sc5#
- 1...Qxb1
- 1.Rd2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(c);N_SPINQ(c),OGATE,XB(A)::R1(B),XP(f)
- Q(c);OGATE::R1(B),XP(f)
- B(b);N_GUARD::S(G),XB(b)
- B(b);N_GUARD::R1(C),XB(b)
- B(b);SBLOCK::QAB(F)
- S(i);N_GUARD::QAB1(F)
- S(i);N_GUARD::QAB1(F),XS(i)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(d);N_GUARD::S(E)
- P(e);N_GUARD,XS(E)::B(A),XQ(c)
- P(e);N_GUARD::B(A),XQ(c)
- P(h);N_GUARD::S(E)
- Tries
- Try
- K(D);P-FLIGHT,XB(b)
- Threat
- DUALS(2)
- Vars
- S(i);N_GUARD::QAB1(F),XS(i)
- Refutation
- Q(c);CHECK
- Try
- R(B);XQ(c)
- Threat
- DUALS(2)
- Vars
- P(e);XS(E)::B(A)+R(B),DCHECK,XP(d)
- S(i);N_GUARD::QAB1(F),XS(i)
- Refutation
- P(e);P_SPINP(e),XR(B)
- Try
- R(C);
- Vars
- P(d);N_GUARD,XR(C)::S(E)
- P(e);N_GUARD,XS(E)::B(A),XQ(c)
- B(b);SBLOCK::QAB(F)
- S(i);N_GUARD::QAB1(F),XS(i)
- Q(c);OGATE::R1(B),XP(f)
- B(b);N_GUARD::S(G),XB(b)
- B(b);N_GUARD::R1(C),XB(b)
- S(i);N_GUARD::QAB1(F)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(d);N_GUARD::S(E)
- P(e);N_GUARD::B(A),XQ(c)
- P(h);N_GUARD::S(E)
- Refutation
- Q(c);N_SPINQ(c),P_PINR(B),XB(A)
- Try
- Actual
- R(B);
- Vars
- Q(c);N_SPINQ(c),OGATE,P_PINR(C),XB(A)::R1(B),XP(f)
- P(d);XR(B)::S(E),XP(d)
- P(e);N_GUARD,XS(E)::B(A),XQ(c)
- B(b);SBLOCK::QAB(F)
- S(i);N_GUARD::QAB1(F),XS(i)
- Q(c);OGATE::R1(B),XP(f)
- B(b);N_GUARD::S(G),XB(b)
- B(b);N_GUARD::R1(C),XB(b)
- S(i);N_GUARD::QAB1(F)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(d);OGATEB::R(B),XP(d)
- P(e);N_GUARD::B(A),XQ(c)
- P(h);N_GUARD::S(E)
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