MESON Chess Problem Database
Problem Display
PID: 195900 (bQB1rb2/5N2/2k2PK1/r2p4/1pPR4/1P1N4/8/8 w - - 0 1)
Stubbs, Arthur Goodwin
The Observer, 1942
(First published on Sun Sep 13 1942)
#2
9 + 7
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.cxd5#
- 1...Ra2
- 2.cxd5#
- 1...Ra3
- 2.cxd5#
- 1...Ra4
- 2.cxd5#
- 1...Rb5
- 2.cxb5#
- 1...Rc5
- 2.Sxb4#
- 1...Ra6
- 2.cxd5#
- 1...Ra7
- 2.cxd5#
- 1...Re1
- 2.Sd8#
- 1...Re2
- 2.Sd8#
- 1...Re3
- 2.Sd8#
- 1...Re4
- 2.Sd8#
- 1...Re5
- 2.Sfxe5#
- 2.Sd8#
- 1...Re6
- 2.Sd8#
- 1...Re7
- 2.Sd8#
- 2.Qd6#
- 1...Rxc8
- 2.Sfe5#
- 1...Rd8
- 2.Sfe5#
- 2.Sxd8#
- 1...Bb7
- 2.Qxb7#
- 1...Bc5
- 2.cxd5#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Qd6#
- 1...Be7
- 2.Sfe5#
- 1...Bg7
- 2.Qd6#
- 1...dxc4
- 2.Bd7#
- 1...Ra1
- Tries
- 1.Kf5?
- 1...Re5+
- 2.Sfxe5#
- 1...Rxc8
- 2.Sfe5#
- 1...Bb7
- 2.Qxb7#
- 1...Ra1
- 2.cxd5#
- 1...Ra2
- 2.cxd5#
- 1...Ra3
- 2.cxd5#
- 1...Ra4
- 2.cxd5#
- 1...Rb5
- 2.cxb5#
- 1...Rc5
- 2.Sxb4#
- 1...Ra6
- 2.cxd5#
- 1...Ra7
- 2.cxd5#
- 1...Re1
- 2.Sd8#
- 1...Re2
- 2.Sd8#
- 1...Re3
- 2.Sd8#
- 1...Re4
- 2.Sd8#
- 1...Re6
- 2.Sd8#
- 1...Re7
- 2.Sd8#
- 2.Qd6#
- 1...Rd8
- 2.Sfe5#
- 2.Sxd8#
- 1...Bc5
- 2.cxd5#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Qd6#
- 1...Be7
- 2.Sfe5#
- 1...Bg7
- 2.Qd6#
- 1...dxc4+!
- 1...Re5+
- 1.Kh5?
- 1...Re5+
- 2.Sfxe5#
- 1...Rxc8
- 2.Sfe5#
- 1...Bb7
- 2.Qxb7#
- 1...Ra1
- 2.cxd5#
- 1...Ra2
- 2.cxd5#
- 1...Ra3
- 2.cxd5#
- 1...Ra4
- 2.cxd5#
- 1...Rb5
- 2.cxb5#
- 1...Rc5
- 2.Sxb4#
- 1...Ra6
- 2.cxd5#
- 1...Ra7
- 2.cxd5#
- 1...Re1
- 2.Sd8#
- 1...Re2
- 2.Sd8#
- 1...Re3
- 2.Sd8#
- 1...Re4
- 2.Sd8#
- 1...Re6
- 2.Sd8#
- 1...Re7
- 2.Sd8#
- 2.Qd6#
- 1...Rd8
- 2.Sfe5#
- 2.Sxd8#
- 1...Bc5
- 2.cxd5#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Qd6#
- 1...Be7
- 2.Sfe5#
- 1...Bg7
- 2.Qd6#
- 1...dxc4+!
- 1...Re5+
- 1.Qa7?
- threat
- 2.Bd7#
- 1...Rxc8
- 2.Sde5#
- 1...Bb7
- 2.Qxb7#
- 1...Re7
- 2.Sxb4#
- 1...Rd8
- 2.Sde5#
- 1...Rxa7!
- threat
- 1.Qxa8+?
- 1...Kb6
- 2.Qb7#
- 1...Kc7
- 2.Qb7#
- 1...Rxa8!
- 1...Kb6
- 1.Kf5?
- Keys
- 1.Kh7!
- 1...Rxc8
- 2.Sfe5#
- 1...dxc4
- 2.Bd7#
- 1...Bb7
- 2.Qxb7#
- 1...Ra1
- 2.cxd5#
- 1...Ra2
- 2.cxd5#
- 1...Ra3
- 2.cxd5#
- 1...Ra4
- 2.cxd5#
- 1...Rb5
- 2.cxb5#
- 1...Rc5
- 2.Sxb4#
- 1...Ra6
- 2.cxd5#
- 1...Ra7
- 2.cxd5#
- 1...Re1
- 2.Sd8#
- 1...Re2
- 2.Sd8#
- 1...Re3
- 2.Sd8#
- 1...Re4
- 2.Sd8#
- 1...Re5
- 2.Sfxe5#
- 2.Sd8#
- 1...Re6
- 2.Sd8#
- 1...Re7
- 2.Qd6#
- 1...Rd8
- 2.Sfe5#
- 2.Sxd8#
- 1...Bc5
- 2.cxd5#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Qd6#
- 1...Be7
- 2.Sfe5#
- 1...Bg7
- 2.Qd6#
- 1...Rxc8
- 1.Kh7!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::P(C),XP(c)
- R(b);OGATE::P(C),XR(b)
- R(b);SBLOCK,S_CUTB(g)::S(B),XP(a)
- R(f);N_GUARD::S(G)
- R(f);N_GUARD,P_PINP(E)::S(G)
- R(f);N_GUARD,XB(I)::S(G)
- B(e);N_GUARD::QAB1(H),XB(e)
- B(g);S_CUTR(b)::P(C),XP(c)
- B(g);N_GUARD::QAR1(H),XB(g)
- B(g);N_GUARD::QAR1(H)
- B(g);S_CUTR(f)::S(G)
- P(c);XP(C)::B(I)
- Tries
- Try
- K(F);S_FLIGHT
- Vars
- R(f);CHECK,N_GUARD::S(G),XR(f)
- R(f);N_GUARD,XB(I)::S(G)
- B(e);N_GUARD::QAB1(H),XB(e)
- R(b);N_GUARD::P(C),XP(c)
- R(b);OGATE::P(C),XR(b)
- R(b);SBLOCK,S_CUTB(g)::S(B),XP(a)
- R(f);N_GUARD::S(G)
- B(g);S_CUTR(b)::P(C),XP(c)
- B(g);N_GUARD::QAR1(H),XB(g)
- B(g);N_GUARD::QAR1(H)
- B(g);S_CUTR(f)::S(G)
- Refutation
- P(c);CHECK,XP(C)
- Try
- K(F);S_FLIGHT
- Vars
- R(f);CHECK,N_GUARD::S(G),XR(f)
- R(f);N_GUARD,XB(I)::S(G)
- B(e);N_GUARD::QAB1(H),XB(e)
- R(b);N_GUARD::P(C),XP(c)
- R(b);OGATE::P(C),XR(b)
- R(b);SBLOCK,S_CUTB(g)::S(B),XP(a)
- R(f);N_GUARD::S(G)
- B(g);S_CUTR(b)::P(C),XP(c)
- B(g);N_GUARD::QAR1(H),XB(g)
- B(g);N_GUARD::QAR1(H)
- B(g);S_CUTR(f)::S(G)
- Refutation
- P(c);CHECK,XP(C)
- Try
- Q(H);
- Threat
- B(I)
- Vars
- R(f);N_GUARD,XB(I)::S(B)
- B(e);N_GUARD::QAB1(H),XB(e)
- R(f);S_CUTB(g)::S(B),XP(a)
- R(f);N_GUARD::S(B)
- Refutation
- R(b);XQ(H)
- Try
- Q(H);CHECK,XB(e)
- Vars
- K(d);P-FLIGHT::QAR1(H)
- Refutation
- R(b);XQ(H)
- Try
- Actual
- K(F);S_FLIGHT
- Vars
- R(f);N_GUARD,XB(I)::S(G)
- P(c);XP(C)::B(I)
- B(e);N_GUARD::QAB1(H),XB(e)
- R(b);N_GUARD::P(C),XP(c)
- R(b);OGATE::P(C),XR(b)
- R(b);SBLOCK,S_CUTB(g)::S(B),XP(a)
- R(b);N_GUARD,P_PINS(G)::P(C),XP(c)
- R(f);N_GUARD::S(G)
- R(f);P_PINS(G),S_CUTB(g)::QAR1(H)
- B(g);S_CUTR(b)::P(C),XP(c)
- B(g);N_GUARD::QAR1(H),XB(g)
- B(g);N_GUARD::QAR1(H)
- B(g);S_CUTR(f)::S(G)
Developed and maintained by Brian Stephenson.
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CSS/Javascript (jQuery, Bootstrap & DataTables).