MESON Chess Problem Database
Problem Display
PID: 186899 (1n2bb2/2Bp2n1/4p3/R1PkN3/6p1/1K1B2r1/3QNpq1/8 w - - 0 1)
Daniel, Arthur William
The Observer, 1933
(First published on Sun May 28 1933)
#2
8 + 11
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rxd3+
- 2.Qxd3#
- 1...Bd6
- 2.cxd6#
- 1...d6
- 2.c6#
- 1...Rxd3+
- Tries
- 1.Kc3?
- threat
- 2.Sf4#
- 2.Qa2#
- 1...Rxd3+
- 2.Qxd3#
- 1...Bd6
- 2.cxd6#
- 1...d6
- 2.c6#
- 1...f1Q
- 2.Qa2#
- 1...f1R
- 2.Qa2#
- 1...Qf3
- 2.Qa2#
- 1...Rf3
- 2.Qa2#
- 1...Sh5
- 2.Qa2#
- 1...Qe4!
- threat
- 1.Qc3?
- threat
- 2.Sf4#
- 2.Qd4#
- 2.Qc4#
- 1...Rxd3
- 2.Qxd3#
- 1...f1Q
- 2.Qd4#
- 2.Qc4#
- 1...f1R
- 2.Qd4#
- 2.Qc4#
- 1...Qf3
- 2.Qd4#
- 2.Qc4#
- 1...Rf3
- 2.Qd4#
- 2.Qc4#
- 1...Bd6
- 2.Sf4#
- 2.Qd4#
- 2.cxd6#
- 1...Sf5
- 2.Sf4#
- 2.Qc4#
- 1...Sh5
- 2.Qd4#
- 2.Qc4#
- 1...Sc6
- 2.Sf4#
- 2.Qc4#
- 1...d6
- 2.Sf4#
- 2.Qd4#
- 2.c6#
- 1...Qe4!
- threat
- 1.Qe3?
- threat
- 2.Sc3#
- 2.Sf4#
- 2.Bc4#
- 2.Qd4#
- 1...f1Q
- 2.Sc3#
- 2.Bc4#
- 2.Qd4#
- 1...f1R
- 2.Sc3#
- 2.Bc4#
- 2.Qd4#
- 1...Qf3
- 2.Sc3#
- 2.Bc4#
- 2.Qd4#
- 1...Qe4
- 2.Sc3#
- 2.Bxe4#
- 2.Qxe4#
- 1...Rf3
- 2.Sc3#
- 2.Bc4#
- 2.Be4#
- 2.Qd4#
- 2.Qe4#
- 1...Sf5
- 2.Sc3#
- 2.Sf4#
- 2.Bc4#
- 1...Sh5
- 2.Sc3#
- 2.Bc4#
- 2.Qd4#
- 1...Sc6
- 2.Sc3#
- 2.Sf4#
- 2.Bc4#
- 1...Rxe3!
- threat
- 1.Qb4?
- threat
- 2.Sc3#
- 2.Sf4#
- 2.Qc4#
- 2.Qd4#
- 1...Bd6
- 2.Qd4#
- 2.cxd6#
- 1...d6
- 2.Qd4#
- 2.c6#
- 1...f1Q
- 2.Sc3#
- 2.Qc4#
- 2.Qd4#
- 1...f1R
- 2.Sc3#
- 2.Qc4#
- 2.Qd4#
- 1...Qf3
- 2.Sc3#
- 2.Qc4#
- 2.Qd4#
- 1...Qe4
- 2.Sc3#
- 2.Qxe4#
- 1...Rf3
- 2.Sc3#
- 2.Qc4#
- 2.Qd4#
- 2.Qe4#
- 1...Sf5
- 2.Sc3#
- 2.Sf4#
- 2.Qc4#
- 1...Sh5
- 2.Sc3#
- 2.Qc4#
- 2.Qd4#
- 1...Sc6
- 2.Sc3#
- 2.Sf4#
- 2.Qc4#
- 1...Rxd3+!
- threat
- 1.Qf4?
- threat
- 2.Sc3#
- 2.Qc4#
- 2.Qd4#
- 1...Qe4
- 2.Qxe4#
- 1...Bd6
- 2.Sc3#
- 2.Qd4#
- 2.cxd6#
- 1...Sf5
- 2.Sc3#
- 2.Qc4#
- 1...Sc6
- 2.Sc3#
- 2.Qc4#
- 1...d6
- 2.Sc3#
- 2.Qd4#
- 2.c6#
- 1...Rxd3+!
- threat
- 1.Qc2?
- threat
- 2.Qc4#
- 1...Rxd3+
- 2.Qxd3#
- 1...Bd6
- 2.cxd6#
- 1...d6
- 2.c6#
- 1...Qe4!
- threat
- 1.Kc3?
- Keys
- 1.Ka4!
- threat
- 2.Qa2#
- 1...Qe4+
- 2.Bc4#
- 1...d6+
- 2.c6#
- 1...Rxd3
- 2.Qxd3#
- 1...Bd6
- 2.cxd6#
- threat
- 1.Ka4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(c);CHECK,OGATE,P_SPINR(c),XB(D)::QAR2(A),XR(c)
- B(k);OGATE::R(E)+P(F),XB(k)
- P(g);S_CUTB(k)::R(E)+P(F)
- Tries
- Try
- K(C);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XB(D)::QAR2(A),XR(c)
- B(k);OGATE::R(E)+P(F),XB(k)
- P(g);S_CUTB(k)::R(E)+P(F)
- P(a);::QAB(A)
- Q(b);::QAB(A)
- R(c);::QAB(A)
- S(h);::QAB(A)
- Refutation
- Q(b);
- Try
- Q(A);N_SPINB(D)
- Threat
- DUALS(3)
- Vars
- R(c);OGATE,P_PINQ(A),XB(D)::QAR2(A),XR(c)
- Refutation
- Q(b);
- Try
- Q(A);N_SPINB(D)
- Threat
- DUALS(4)
- Refutation
- R(c);P_PINB(D),XQ(A)
- Try
- Q(A);
- Threat
- DUALS(4)
- Refutation
- R(c);CHECK,XB(D)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- Q(b);N_GUARD::QAB1(A),XQ(b)
- Refutation
- R(c);CHECK,XB(D)
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- R(c);CHECK,OGATE,XB(D)::QAR2(A),XR(c)
- B(k);OGATE::R(E)+P(F),XB(k)
- P(g);S_CUTB(k)::R(E)+P(F)
- Refutation
- Q(b);
- Try
- Actual
- K(C);N_SPINB(D),S_FLIGHT
- Threat
- QAB(A)
- Vars
- Q(b);CHECK,SBLOCK::QAR(A)+B(D),DCHECK
- P(g);CHECK,S_CUTB(k)::R(E)+P(F)
- R(c);OGATE,P_SPINR(c),XB(D)::QAR2(A),XR(c)
- B(k);OGATE::R(E)+P(F),XB(k)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).