MESON Chess Problem Database
Problem Display
PID: 164842 (7n/1N2pNQ1/2P1k3/2pr2pK/2P3P1/1p6/1B6/8 w - - 0 1)
Evans, TC
The Observer, 1926
(First published on Sun Dec 12 1926)
#2
8 + 7
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd2
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd3
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd4
- 2.Sxc5#
- 2.Sxg5#
- 1...Re5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rf5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rd6
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd7
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd8
- 2.Sxc5#
- 2.Sbxd8#
- 2.Sxg5#
- 2.Sfxd8#
- 1...Sg6
- 2.Qxg6#
- 1...Sxf7
- 2.Qg6#
- 1...Rd1
- Tries
- 1.Kh6?
- 1...Rd1
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd2
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd3
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd4
- 2.Sxc5#
- 2.Sxg5#
- 1...Re5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rf5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rd6
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd7
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd8
- 2.Sxc5#
- 2.Sbxd8#
- 2.Sxg5#
- 2.Sfxd8#
- 1...Sg6
- 2.Qxg6#
- 1...Sxf7+!
- 1...Rd1
- 1.Sfd6?
- 1...Rxd6
- 2.Sxc5#
- 1...exd6
- 2.Sd8#
- 2.Qf6#
- 2.Qd7#
- 1...Rd1
- 2.Qe5#
- 1...Rd2
- 2.Qe5#
- 1...Rd3
- 2.Qe5#
- 1...Re5
- 2.Qxe5#
- 1...Rf5
- 2.gxf5#
- 1...Sg6
- 2.Qxg6#
- 2.Qf7#
- 2.Qg8#
- 1...Sf7
- 2.Qg6#
- 2.Qxf7#
- 1...Rd4!
- 1...Rxd6
- 1.Sh6?
- 1...Rd1
- 2.Qe5#
- 1...Rd2
- 2.Qe5#
- 1...Rd3
- 2.Qe5#
- 1...Re5
- 2.Qxe5#
- 1...Rf5
- 2.gxf5#
- 1...Rd6
- 2.Sxc5#
- 2.Qe5#
- 1...Rd7
- 2.Qe5#
- 1...Rd8
- 2.Qe5#
- 1...Sg6
- 2.Qxg6#
- 2.Qf7#
- 2.Qg8#
- 1...Sf7
- 2.Qg6#
- 2.Qxf7#
- 1...Rd4!
- 1...Rd1
- 1.Ba1?
- 1...Sxf7
- 2.Qg6#
- 1...Rd4
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd1
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd2
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd3
- 2.Sxc5#
- 2.Sxg5#
- 1...Re5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rf5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rd6
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd7
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd8
- 2.Sxc5#
- 2.Sbxd8#
- 2.Sxg5#
- 2.Sfxd8#
- 1...Sg6
- 2.Qxg6#
- 1...b2!
- 1...Sxf7
- 1.Bc3?
- 1...Sxf7
- 2.Qg6#
- 1...Rd4
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd1
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd2
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd3
- 2.Sxc5#
- 2.Sxg5#
- 1...Re5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rf5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rd6
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd7
- 2.Sxc5#
- 2.Sxg5#
- 1...Rd8
- 2.Sxc5#
- 2.Sbxd8#
- 2.Sxg5#
- 2.Sfxd8#
- 1...Sg6
- 2.Qxg6#
- 1...b2!
- 1...Sxf7
- 1.Be5?
- threat
- 2.Sxg5#
- 1...Rxe5
- 2.Sbd8#
- 2.Sfd8#
- 1...Sxf7!
- threat
- 1.Qh6+?
- 1...Sg6
- 2.Qxg6#
- 1...Kxf7!
- 1...Sg6
- 1.Qxh8?
- 1...Rd1
- 2.Sxg5#
- 1...Rd2
- 2.Sxg5#
- 1...Rd3
- 2.Sxg5#
- 1...Rd4
- 2.Sxg5#
- 1...Re5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rf5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rd6
- 2.Sxg5#
- 1...Rd7
- 2.Sxg5#
- 1...Rd8
- 2.Sbxd8#
- 2.Sxg5#
- 2.Sfxd8#
- 1...Kxf7!
- 1...Rd1
- 1.Qxg5?
- threat
- 2.Qxd5#
- 1...Rxg5+
- 2.Sxg5#
- 1...Rd1
- 2.Qf5#
- 1...Rd2
- 2.Qf5#
- 1...Rd3
- 2.Qf5#
- 1...Rd4
- 2.Qf5#
- 1...Re5
- 2.Sbd8#
- 2.Sfd8#
- 1...Rf5
- 2.Sbd8#
- 2.Sfd8#
- 2.Qxf5#
- 1...Rd6
- 2.Qf5#
- 1...Rd7
- 2.Qf5#
- 1...Rd8
- 2.Sbxd8#
- 2.Sfxd8#
- 2.Qf5#
- 1...Kxf7!
- threat
- 1.Qh7?
- 1...Sxf7
- 2.Qg6#
- 1...Rd4
- 2.Qf5#
- 1...Rd1
- 2.Sxc5#
- 2.Sxg5#
- 2.Qf5#
- 1...Rd2
- 2.Sxc5#
- 2.Sxg5#
- 2.Qf5#
- 1...Rd3
- 2.Sxc5#
- 2.Sxg5#
- 2.Qf5#
- 1...Rf5
- 2.Sbd8#
- 2.Sfd8#
- 2.Qxf5#
- 2.gxf5#
- 1...Rd6
- 2.Sxc5#
- 2.Sxg5#
- 2.Qf5#
- 1...Rd7
- 2.Sxc5#
- 2.Sxg5#
- 2.Qf5#
- 1...Rd8
- 2.Sxc5#
- 2.Sbxd8#
- 2.Sxg5#
- 2.Sfxd8#
- 2.Qf5#
- 1...Sg6
- 2.Qxg6#
- 1...Re5!
- 1...Sxf7
- 1.Kh6?
- Keys
- 1.Sbd6!
- 1...Rxd6
- 2.Sxg5#
- 1...Sxf7
- 2.Qg6#
- 1...exd6
- 2.Sd8#
- 2.Qf6#
- 1...Rd1
- 2.Qe5#
- 1...Rd2
- 2.Qe5#
- 1...Rd3
- 2.Qe5#
- 1...Rd4
- 2.Qe5#
- 1...Re5
- 2.Qxe5#
- 1...Rf5
- 2.gxf5#
- 1...Sg6
- 2.Qxg6#
- 1...Rxd6
- 1.Sbd6!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- S(g);N_GUARD::QAR2(H),XS(g)
- S(g);N_GUARD,XS(G)::QAR2(H)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- S(g);N_GUARD::QAR2(H),XS(g)
- Refutation
- S(g);CHECK,XS(G)
- Try
- S(G);
- Vars
- R(c);N_GUARD,SBLOCK,XS(G)::S(F),XP(b)
- R(c);N_GUARD::QAR1(H)
- R(c);N_GUARD::QAR1(H),XR(c)
- R(c);OGATE::P(C),XR(c)
- Refutation
- R(c);
- Try
- S(G);
- Vars
- R(c);N_GUARD::QAR1(H)
- R(c);N_GUARD::QAR1(H),XR(c)
- R(c);OGATE::P(C),XR(c)
- Refutation
- R(c);
- Try
- B(A);
- Vars
- S(g);N_GUARD,XS(G)::QAR2(H)
- S(g);N_GUARD::QAR2(H),XS(g)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- S(g);N_GUARD,XS(G)::QAR2(H)
- S(g);N_GUARD::QAR2(H),XS(g)
- Refutation
- P(a);
- Try
- B(A);
- Threat
- S(G),XP(d)
- Refutation
- S(g);XS(G)
- Try
- Q(H);CHECK
- Vars
- S(g);N_GUARD,P_SPINS(g)::QAR2(H),XS(g)
- Refutation
- K(e);S_FLIGHT,XS(G)
- Try
- Q(H);XS(g)
- Vars
- R(c);N_GUARD::S(G),XP(d)
- Refutation
- K(e);S_FLIGHT,XS(G)
- Try
- Q(H);P_SPINQ(H),XP(d)
- Threat
- QAB1(H),XR(c)
- Vars
- R(c);CHECK,XQ(H)::S(G),XR(c)
- R(c);N_GUARD,N_PINQ(H)::QAB1(H)
- Refutation
- K(e);S_FLIGHT,XS(G)
- Try
- Q(H);
- Vars
- S(g);N_GUARD,XS(G)::QAR2(H)
- R(c);N_GUARD::QAB1(H)
- S(g);N_GUARD::QAR2(H),XS(g)
- Refutation
- R(c);
- Try
- Actual
- S(F);
- Vars
- R(c);N_GUARD,SBLOCK,XS(F)::S(G),XP(d)
- S(g);N_GUARD,XS(G)::QAR2(H)
- R(c);N_GUARD::QAR1(H)
- R(c);N_GUARD::QAR1(H),XR(c)
- R(c);OGATE::P(C),XR(c)
- S(g);N_GUARD::QAR2(H),XS(g)
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