MESON Chess Problem Database
Problem Display
PID: 192708 (4n3/1Rp5/p7/N1k1B3/3r4/1QPPN3/2n1K3/8 w - - 0 1)
Rains, Cyril George
The Observer, 1939
(First published on Sun May 14 1939)
#2
8 + 6
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rxd3
- 2.Qc4#
- 1...Ra4
- 2.Qd5#
- 1...Rb4
- 2.Qd5#
- 1...Rc4
- 2.Qxc4#
- 1...Re4
- 2.Qd5#
- 1...Rf4
- 2.Qd5#
- 1...Rg4
- 2.Qd5#
- 1...Rh4
- 2.Qd5#
- 1...Rd5
- 2.Qc4#
- 2.Qxd5#
- 1...Rd6
- 2.Qc4#
- 1...Rd7
- 2.Qc4#
- 1...Rd8
- 2.Qc4#
- 1...Sa1
- 2.cxd4#
- 1...Se1
- 2.cxd4#
- 1...Sa3
- 2.cxd4#
- 1...Sxe3
- 2.cxd4#
- 1...Sb4
- 2.cxd4#
- 1...Sd6
- 2.Rxc7#
- 1...Sf6
- 2.Rxc7#
- 1...Sg7
- 2.Rxc7#
- 1...c6
- 2.Qb6#
- 1...Rxd3
- Tries
- 1.Kd2?
- 1...Sxe3
- 2.cxd4#
- 1...Ra4
- 2.Qd5#
- 1...Rb4
- 2.Qd5#
- 1...Rc4
- 2.Qxc4#
- 1...Re4
- 2.Qd5#
- 1...Rf4
- 2.Qd5#
- 1...Rg4
- 2.Qd5#
- 1...Rh4
- 2.Qd5#
- 1...Rd5
- 2.Qc4#
- 2.Qxd5#
- 1...Rd6
- 2.Qc4#
- 1...Rd7
- 2.Qc4#
- 1...Rd8
- 2.Qc4#
- 1...Sa1
- 2.cxd4#
- 1...Se1
- 2.cxd4#
- 1...Sa3
- 2.cxd4#
- 1...Sb4
- 2.cxd4#
- 1...Sd6
- 2.Rxc7#
- 1...Sf6
- 2.Rxc7#
- 1...Sg7
- 2.Rxc7#
- 1...c6
- 2.Qb6#
- 1...Rxd3+!
- 1...Sxe3
- 1.Kf2?
- 1...Rxd3
- 2.Qc4#
- 1...Sxe3
- 2.cxd4#
- 1...Ra4
- 2.Qd5#
- 1...Rb4
- 2.Qd5#
- 1...Rc4
- 2.Qxc4#
- 1...Re4
- 2.Qd5#
- 1...Rg4
- 2.Qd5#
- 1...Rh4
- 2.Qd5#
- 1...Rd5
- 2.Qc4#
- 2.Qxd5#
- 1...Rd6
- 2.Qc4#
- 1...Rd7
- 2.Qc4#
- 1...Rd8
- 2.Qc4#
- 1...Sa1
- 2.cxd4#
- 1...Se1
- 2.cxd4#
- 1...Sa3
- 2.cxd4#
- 1...Sb4
- 2.cxd4#
- 1...Sd6
- 2.Rxc7#
- 1...Sf6
- 2.Rxc7#
- 1...Sg7
- 2.Rxc7#
- 1...c6
- 2.Qb6#
- 1...Rf4+!
- 1...Rxd3
- 1.Bd6+?
- 1...Rxd6
- 2.Qc4#
- 1...Sxd6
- 2.Rxc7#
- 1...cxd6
- 2.Qb6#
- 1...Kxd6!
- 1...Rxd6
- 1.Qa4?
- threat
- 2.Sb3#
- 2.Qc6#
- 1...Sxe3
- 2.Qc6#
- 2.Qxd4#
- 1...Rb4
- 2.Qc6#
- 1...Rd6
- 2.Sb3#
- 2.Qc4#
- 1...Sa1
- 2.Qc6#
- 2.Qxd4#
- 2.cxd4#
- 1...Sb4
- 2.Sb3#
- 2.cxd4#
- 1...c6
- 2.Sb3#
- 2.Qxc6#
- 1...Rxa4!
- threat
- 1.Qe6?
- threat
- 2.Sb3#
- 2.Qc6#
- 1...Rb4
- 2.Qd5#
- 2.Qc6#
- 1...Rd6
- 2.Qc4#
- 1...Sa1
- 2.Bxd4#
- 2.Qc6#
- 2.cxd4#
- 1...Sb4
- 2.Sb3#
- 2.Bxd4#
- 2.cxd4#
- 1...c6
- 2.Sb3#
- 2.Qxc6#
- 1...Sd6!
- threat
- 1.Qa3+?
- 1...Sxa3
- 2.cxd4#
- 1...Sb4
- 2.cxd4#
- 1...Rb4!
- 1...Sxa3
- 1.Qb4+?
- 1...Sxb4
- 2.cxd4#
- 1...Rxb4!
- 1...Sxb4
- 1.Kd2?
- Keys
- 1.Qf7!
- 1...Rxd3
- 2.Qc4#
- 1...Sxe3
- 2.cxd4#
- 1...Ra4
- 2.Qd5#
- 1...Rb4
- 2.Qd5#
- 1...Rc4
- 2.Qxc4#
- 2.Qd5#
- 1...Re4
- 2.Qd5#
- 1...Rf4
- 2.Qd5#
- 1...Rg4
- 2.Qd5#
- 1...Rh4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qc4#
- 1...Rd7
- 2.Qc4#
- 1...Rd8
- 2.Qc4#
- 1...Sa1
- 2.cxd4#
- 1...Se1
- 2.cxd4#
- 1...Sa3
- 2.cxd4#
- 1...Sb4
- 2.cxd4#
- 1...Sd6
- 2.Qxc7#
- 1...Sf6
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...c6
- 2.Sb3#
- 1...Rxd3
- 1.Qf7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(b);N_GUARD,XP(D)::QAR1(B)
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(b);N_GUARD,P_PINS(E)::QAR1(B)
- S(a);N_GUARD::P(C),XR(b)
- S(a);N_GUARD,XS(E)::P(C),XR(b)
- S(f);N_GUARD::R(H),XP(e)
- P(e);N_GUARD::QAB1(B)
- Tries
- Try
- K(A);P-FLIGHT,P_SPINP(D)
- Vars
- S(a);N_GUARD,XS(E)::P(C),XR(b)
- R(b);N_GUARD,N_PINP(D)::QAR1(B)
- R(b);N_GUARD,N_PINP(D)::QAR1(B),XR(b)
- R(b);N_GUARD::QAR1(B)
- S(a);N_GUARD::P(C),XR(b)
- S(f);N_GUARD::R(H),XP(e)
- P(e);N_GUARD::QAB1(B)
- Refutation
- R(b);CHECK,XP(D)
- Try
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD,XP(D)::QAR1(B)
- S(a);N_GUARD,XS(E)::P(C),XR(b)
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- S(a);N_GUARD::P(C),XR(b)
- S(f);N_GUARD::R(H),XP(e)
- P(e);N_GUARD::QAB1(B)
- Refutation
- R(b);CHECK
- Try
- B(G);CHECK
- Vars
- R(b);SBLOCK,XB(G)::QAR1(B)
- S(f);SBLOCK,XB(G)::R(H),XP(e)
- P(e);XB(G)::QAB1(B)
- Refutation
- K(c);S_FLIGHT,XB(G)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(b);::QAR1(B)
- Refutation
- R(b);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(b);N_GUARD::QAR1(B)
- Refutation
- S(f);
- Try
- Q(B);CHECK
- Vars
- S(a);XQ(B)::P(C),XR(b)
- S(a);P_SPINS(a)::P(C),XR(b)
- Refutation
- R(b);P_SPINR(b)
- Try
- Q(B);CHECK
- Vars
- S(a);XQ(B)::P(C),XR(b)
- Refutation
- R(b);XQ(B)
- Try
- Actual
- Q(B);
- Vars
- R(b);N_GUARD,XP(D)::QAR1(B)
- S(a);N_GUARD,XS(E)::P(C),XR(b)
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD,P_PINS(E)::QAR1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- S(a);N_GUARD::P(C),XR(b)
- S(f);N_GUARD::QAR2(B),XP(e)
- P(e);SBLOCK::S(F)
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