MESON Chess Problem Database
Problem Display
PID: 263919 (8/1Pp5/4B3/K4N2/RQN1k1p1/2n1P3/2P1PP2/B3b2n w - - 0 1)
Shannon, J
Sunday Referee, 1935
(First published on Sun Jan 6 1935)
#2
12 + 6
| 15239 | Valois Notebooks | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Sxf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sb1
- 2.Sd2#
- 2.Scd6#
- 1...Sd1
- 2.Sd2#
- 2.Scd6#
- 1...Sa2
- 2.Sd2#
- 2.Scd6#
- 1...Sxe2
- 2.Sd2#
- 1...Sxa4
- 2.Sd2#
- 2.Scd6#
- 1...Sb5
- 2.Sd2#
- 2.Scd6#
- 1...Sd5
- 2.Sd2#
- 2.Scd6#
- 1...g3
- 2.f3#
- 1...c5
- 2.Sfd6#
- 1...c6
- 2.Sfd6#
- 1...Sxf2
- Tries
- 1.Se7?
- threat
- 2.Bf5#
- 1...Sxe2
- 2.Sd2#
- 2.Bd5#
- 1...Sg3!
- threat
- 1.Bxc3?
- threat
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se5#
- 2.Sb6#
- 2.Scd6#
- 1...Bd2
- 2.Sb2#
- 2.Sxd2#
- 2.Sa3#
- 2.Se5#
- 2.Sb6#
- 2.Scd6#
- 1...c5
- 2.Sd2#
- 2.Scd6#
- 2.Sfd6#
- 1...Bxc3!
- threat
- 1.Qxc3?
- threat
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se5#
- 2.Sb6#
- 2.Scd6#
- 1...Bd2
- 2.Sb2#
- 2.Sxd2#
- 2.Sa3#
- 2.Se5#
- 2.Sb6#
- 2.Scd6#
- 1...c5
- 2.Sd2#
- 2.Scd6#
- 2.Sfd6#
- 1...Bxc3+!
- threat
- 1.Qc5?
- threat
- 2.Sd2#
- 2.Scd6#
- 2.Qd4#
- 2.Qe5#
- 1...Sb1+
- 2.Sd2#
- 1...Sd1+
- 2.Sd2#
- 1...Sa2+
- 2.Sd2#
- 1...Sxe2+
- 2.Sd2#
- 1...Sb5+
- 2.Sd2#
- 1...Sd5+
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 2.Scd6#
- 2.Qd4#
- 2.Qe5#
- 1...Sxa4+!
- threat
- 1.Qd6?
- threat
- 2.Sd2#
- 2.Qf4#
- 2.Qe5#
- 2.Qd3#
- 2.Qd4#
- 1...Sb1+
- 2.Sd2#
- 1...Sd1+
- 2.Sd2#
- 1...Sa2+
- 2.Sd2#
- 1...Sxe2+
- 2.Sd2#
- 1...Sb5+
- 2.Sd2#
- 1...Sd5+
- 2.Sd2#
- 1...Sxf2
- 2.Sd2#
- 2.Sg3#
- 2.Qf4#
- 2.Qe5#
- 2.Qd4#
- 1...cxd6
- 2.Sfxd6#
- 1...Bd2
- 2.Sxd2#
- 2.Qf4#
- 2.Qe5#
- 2.Qd3#
- 2.Qd4#
- 1...c5
- 2.Sd2#
- 2.Qf4#
- 2.Qe5#
- 2.Qd3#
- 1...Sxa4+!
- threat
- 1.Qb5?
- threat
- 2.Sd2#
- 2.Scd6#
- 2.Qe5#
- 1...Sb1+
- 2.Sd2#
- 1...Sd1+
- 2.Sd2#
- 1...Sa2+
- 2.Sd2#
- 1...Sxe2+
- 2.Sd2#
- 1...Sxb5+
- 2.Sd2#
- 1...Sd5+
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 2.Scd6#
- 2.Qe5#
- 1...c5
- 2.Sfd6#
- 1...Sxa4+!
- threat
- 1.f4?
- threat
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se5#
- 2.Sb6#
- 2.Scd6#
- 1...Sxe2
- 2.Sd2#
- 1...Sxa4
- 2.Sd2#
- 2.Scd6#
- 1...Bd2
- 2.Sb2#
- 2.Sxd2#
- 2.Sa3#
- 2.Se5#
- 2.Sb6#
- 2.Scd6#
- 1...Sb1
- 2.Sd2#
- 2.Scd6#
- 1...Sd1
- 2.Sd2#
- 2.Scd6#
- 1...Sa2
- 2.Sd2#
- 2.Scd6#
- 1...Sb5
- 2.Sd2#
- 2.Scd6#
- 1...Sd5
- 2.Sd2#
- 2.Scd6#
- 1...c5
- 2.Sd2#
- 2.Scd6#
- 2.Sfd6#
- 1...gxf4 ep!
- threat
- 1.Se7?
- Keys
- 1.Qb1!
- 1...Sxb1+
- 2.Sd2#
- 1...Sd1+
- 2.Sd2#
- 2.c3#
- 1...Sa2+
- 2.Sd2#
- 2.c3#
- 1...Sxe2+
- 2.Sd2#
- 1...Sxa4+
- 2.c3#
- 1...Sb5+
- 2.Sd2#
- 2.c3#
- 1...Sd5+
- 2.Sd2#
- 2.c3#
- 1...Bxf2
- 2.Qxh1#
- 1...Sxf2
- 2.Sg3#
- 1...Bd2
- 2.Qxh1#
- 1...Sg3
- 2.Sxg3#
- 1...g3
- 2.f3#
- 1...c5
- 2.Sfd6#
- 1...c6
- 2.Sfd6#
- 1...Sxb1+
- 1.Qb1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD,XP(D)::S(J)
- S(b);N_GUARD::S(J),XS(b)
- S(c);P_PINQ(G),XP(C)::QAR(G)+S(H),DCHECK
- P(e);N_GUARD::P(D)
- P(f);N_GUARD::S(J)
- Tries
- Try
- S(J);
- Threat
- B(K)
- Refutation
- S(b);
- Try
- B(A);XS(c)
- Threat
- DUALS(6)
- Refutation
- B(a);P_PINQ(G),XB(A)
- Try
- Q(G);P_SPINQ(G),XS(c)
- Threat
- DUALS(6)
- Refutation
- B(a);CHECK,XQ(G)
- Try
- Q(G);
- Threat
- DUALS(4)
- Vars
- S(c);CHECK::R(F)+S(H),DCHECK
- S(c);CHECK,XP(C)::R(F)+S(H),DCHECK
- Refutation
- S(c);CHECK,XR(F)
- Try
- Q(G);
- Threat
- DUALS(5)
- Vars
- S(c);CHECK::R(F)+S(H),DCHECK
- S(c);CHECK,XP(C)::R(F)+S(H),DCHECK
- P(f);XQ(G)::S(J),XP(f)
- Refutation
- S(c);CHECK,XR(F)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- S(c);CHECK::R(F)+S(H),DCHECK
- S(c);CHECK,XP(C)::R(F)+S(H),DCHECK
- S(c);CHECK,XQ(G)::R(F)+S(H),DCHECK
- P(f);N_GUARD::S(J)
- Refutation
- S(c);CHECK,XR(F)
- Try
- P(D);
- Threat
- DUALS(6)
- Vars
- S(c);P_PINQ(G),XP(C)::QAR(G)+S(H),DCHECK
- Refutation
- P(e);EP,XP(D)
- Try
- Actual
- Q(G);
- Vars
- S(c);CHECK,XQ(G)::R(F)+S(H),DCHECK
- S(c);CHECK,XP(C)::R(F)+S(H),DCHECK
- S(c);CHECK,OGATE,XR(F)::QAB(G)+P(B)
- B(a);OGATE,XP(D)::QAB(G),XS(b)
- S(b);N_GUARD,XP(D)::S(J)
- B(a);OGATE::QAB(G),XS(b)
- S(b);N_GUARD::S(J),XS(b)
- P(e);N_GUARD::P(D)
- P(f);N_GUARD::S(J)
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).