MESON Chess Problem Database
Problem Display
PID: 161843 (1K6/1B1pQn2/5p2/N4p2/r2k4/8/1P2R1n1/3rN3 w - - 0 1)
Holroyd, GC
The Observer, 1923
(First published on Sun Sep 30 1923)
#2
7 + 8
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Rda1
- 2.Rd2#
- 1...Rb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Rxe1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rd3
- 2.Sc2#
- 1...Raa1
- 2.Qb4#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Sb3#
- 1...Rxa5
- 2.Qb4#
- 1...Sxe1
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Qe3#
- 1...Sh4
- 2.Qe3#
- 1...Se5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sh6
- 2.Qd6#
- 1...Sd8
- 2.Qd6#
- 1...Sh8
- 2.Qd6#
- 1...f4
- 2.Re4#
- 1...Rda1
- Tries
- 1.Bxg2?
- threat
- 2.Qe3#
- 1...Rb4+
- 2.Qxb4#
- 1...Rxa5
- 2.Qb4#
- 1...Rd3
- 2.Sc2#
- 1...Ra3
- 2.Qb4#
- 1...Se5
- 2.Qd6#
- 1...f4!
- threat
- 1.Bf3?
- 1...Rb4+
- 2.Qxb4#
- 1...Rxe1
- 2.Rd2#
- 1...Rxa5
- 2.Qb4#
- 1...Sxe1
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...d6
- 2.Qa7#
- 1...Rda1
- 2.Rd2#
- 1...Rb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rd3
- 2.Sc2#
- 1...Raa1
- 2.Qb4#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rc4
- 2.Sb3#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Qe3#
- 1...Sh4
- 2.Qe3#
- 1...Se5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sh6
- 2.Qd6#
- 1...Sd8
- 2.Qd6#
- 1...Sh8
- 2.Qd6#
- 1...d5
- 2.Qa7#
- 1...f4!
- 1...Rb4+
- 1.Bc6?
- 1...Rb4+
- 2.Qxb4#
- 1...Rxe1
- 2.Rd2#
- 1...Rxa5
- 2.Qb4#
- 1...Sxe1
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...d6
- 2.Qa7#
- 1...f4
- 2.Re4#
- 1...Rda1
- 2.Rd2#
- 1...Rb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rd3
- 2.Sc2#
- 1...Raa1
- 2.Qb4#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rc4
- 2.Sb3#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Qe3#
- 1...Sh4
- 2.Qe3#
- 1...Se5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sh6
- 2.Qd6#
- 1...Sd8
- 2.Qd6#
- 1...Sh8
- 2.Qd6#
- 1...d5
- 2.Qa7#
- 1...dxc6!
- 1...Rb4+
- 1.Qa3?
- threat
- 2.Sc2#
- 2.Sf3#
- 2.Qc3#
- 1...Rxe1
- 2.Qc3#
- 1...Rxa5
- 2.Qb4#
- 2.Qc3#
- 1...Sxe1
- 2.Qc3#
- 2.Qe3#
- 1...Rb4
- 2.Qxb4#
- 2.Qc3#
- 1...Se3
- 2.Sf3#
- 2.Qc3#
- 2.Qxe3#
- 1...Rc1
- 2.Sf3#
- 1...Rd2
- 2.Sf3#
- 2.Qc3#
- 1...Rd3
- 2.Sc2#
- 1...Rc4
- 2.Sf3#
- 2.Sb3#
- 1...Sh4
- 2.Sc2#
- 2.Qc3#
- 2.Qe3#
- 1...Se5
- 2.Sc2#
- 2.Qd6#
- 2.Qc3#
- 1...Sg5
- 2.Sc2#
- 2.Qd6#
- 2.Qc3#
- 1...Rxa3!
- threat
- 1.Qxf6+?
- 1...Se5
- 2.Qxe5#
- 2.Qb6#
- 2.Qd6#
- 1...Kc5!
- 1...Se5
- 1.Qxd7+?
- 1...Sd6
- 2.Qxd6#
- 1...Kc5!
- 1...Sd6
- 1.Bxg2?
- Keys
- 1.Ba8!
- 1...Rb4+
- 2.Qxb4#
- 1...Rxe1
- 2.Rd2#
- 1...Rxa5
- 2.Qb4#
- 1...Sxe1
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...d6
- 2.Qa7#
- 1...f4
- 2.Re4#
- 1...Rda1
- 2.Rd2#
- 1...Rb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rd3
- 2.Sc2#
- 1...Raa1
- 2.Qb4#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rc4
- 2.Sb3#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Qe3#
- 1...Sh4
- 2.Qe3#
- 1...Se5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sh6
- 2.Qd6#
- 1...Sd8
- 2.Qd6#
- 1...Sh8
- 2.Qd6#
- 1...d5
- 2.Qa7#
- 1...Rb4+
- 1.Ba8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::R(C)
- R(a);N_GUARD,XS(A)::R(C)
- R(a);N_GUARD::R(C),XR(a)
- R(a);SBLOCK::S(A)
- R(c);N_GUARD::QAR2(F)
- R(c);N_GUARD,P_PINB(E)::QAR2(F),XR(c)
- R(c);SBLOCK::S(D)
- R(c);N_GUARD,XS(D)::QAR2(F)
- S(b);N_GUARD,XS(A)::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- S(b);N_GUARD::QAB1(F)
- S(h);N_GUARD::QAR2(F)
- S(h);N_GUARD::QAR2(F),XS(h)
- P(e);N_GUARD::R1(C)
- Tries
- Try
- B(E);XS(b)
- Threat
- QAB1(F)
- Vars
- R(c);CHECK,N_GUARD::QAR2(F),XR(c)
- R(c);N_GUARD,XS(D)::QAR2(F)
- R(a);SBLOCK::S(A)
- R(c);N_GUARD::QAR2(F)
- S(h);N_GUARD::QAR2(F)
- Refutation
- P(e);
- Try
- B(E);
- Vars
- R(c);CHECK,N_GUARD::QAR2(F),XR(c)
- R(a);N_GUARD,XS(A)::R(C)
- R(c);N_GUARD,XS(D)::QAR2(F)
- S(b);N_GUARD,XS(A)::QAB1(F)
- S(h);N_GUARD::QAR2(F),XS(h)
- P(g);OGATE::QAB(F)
- R(a);N_GUARD::R(C)
- R(a);N_GUARD,P_PINP(B)::R(C)
- R(a);N_GUARD::R(C),XR(a)
- R(a);SBLOCK::S(A)
- R(c);N_GUARD::QAR2(F)
- R(c);SBLOCK::S(D)
- S(b);N_GUARD::QAB1(F),XS(b)
- S(b);N_GUARD::QAB1(F)
- S(h);N_GUARD::QAR2(F)
- Refutation
- P(e);
- Try
- B(E);
- Vars
- R(c);CHECK,N_GUARD::QAR2(F),XR(c)
- R(a);N_GUARD,XS(A)::R(C)
- R(c);N_GUARD,XS(D)::QAR2(F)
- S(b);N_GUARD,XS(A)::QAB1(F)
- S(h);N_GUARD::QAR2(F),XS(h)
- P(g);OGATE::QAB(F)
- P(e);N_GUARD::R1(C)
- R(a);N_GUARD::R(C)
- R(a);N_GUARD,P_PINP(B)::R(C)
- R(a);N_GUARD::R(C),XR(a)
- R(a);SBLOCK::S(A)
- R(c);N_GUARD::QAR2(F)
- R(c);SBLOCK::S(D)
- S(b);N_GUARD::QAB1(F),XS(b)
- S(b);N_GUARD::QAB1(F)
- S(h);N_GUARD::QAR2(F)
- Refutation
- P(g);XB(E)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- R(a);XS(A)::QAB1(F)
- R(a);::S(A)
- Refutation
- R(c);XQ(F)
- Try
- Q(F);CHECK,XP(f)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(F);CHECK,XP(g)
- Vars
- S(h);N_GUARD,P_SPINS(h)::QAR2(F),XS(h)
- Refutation
- K(d);S_FLIGHT
- Try
- Actual
- B(E);
- Vars
- R(c);CHECK,N_GUARD::QAR2(F),XR(c)
- R(a);N_GUARD,XS(A)::R(C)
- R(c);N_GUARD,XS(D)::QAR2(F)
- S(b);N_GUARD,XS(A)::QAB1(F)
- S(h);N_GUARD::QAR2(F),XS(h)
- P(g);OGATE::QAB(F)
- P(e);N_GUARD::R1(C)
- R(a);N_GUARD::R(C)
- R(a);N_GUARD,P_PINP(B)::R(C)
- R(a);N_GUARD::R(C),XR(a)
- R(a);SBLOCK::S(A)
- R(c);N_GUARD::QAR2(F)
- R(c);SBLOCK::S(D)
- S(b);N_GUARD::QAB1(F),XS(b)
- S(b);N_GUARD::QAB1(F)
- S(h);N_GUARD::QAR2(F)
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