MESON Chess Problem Database
Problem Display
PID: 257638 (1Q2NKb1/2rpppr1/2p1k1p1/4q3/2PnNPP1/2n5/8/8 w - - 0 1)
Easter, Norris
British Chess Magazine, 1934
#2
7 + 12
SOLUTION
- SOUND
- Sets
- 1...Qd6
- 2.Sg5#
- 2.Sxg7#
- 1...Qf6
- 2.Sc5#
- 2.Sxc7#
- 1...Qa5
- 2.Sxg7#
- 1...Qb5
- 2.Sxc7#
- 2.Sxg7#
- 1...Qc5
- 2.Sxc5#
- 2.Sxc7#
- 2.Sxg7#
- 1...Qd5
- 2.Sxc7#
- 2.Sxg7#
- 1...Qf5
- 2.Sxc7#
- 2.Sxg7#
- 1...Qg5
- 2.Sxg5#
- 2.Sxc7#
- 2.Sxg7#
- 1...Qh5
- 2.Sxc7#
- 2.Sxg7#
- 1...Ra7
- 2.Qxe5#
- 1...Rb7
- 2.Qxe5#
- 1...Rc8
- 2.Qxe5#
- 1...Sd5
- 2.Sc5#
- 1...Sf5
- 2.Sg5#
- 1...d5
- 2.Sc5#
- 1...f5
- 2.Sg5#
- 1...f6
- 2.Sxg7#
- 1...Qd6
- Keys
- 1.Qd8!
- threat
- 2.Qxe7#
- 1...Qd6
- 2.Sg5#
- 2.Sxg7#
- 1...Qf6
- 2.Sc5#
- 2.Sxc7#
- 1...Qc5
- 2.Sxc5#
- 2.Sxc7#
- 2.Sxg7#
- 1...Qg5
- 2.Sxg5#
- 2.Sxc7#
- 2.Sxg7#
- 1...Sd5
- 2.Sc5#
- 1...Sf5
- 2.Sg5#
- 1...d5
- 2.Sc5#
- 1...d6
- 2.Sxc7#
- 1...f5
- 2.Sg5#
- 1...f6
- 2.Sxg7#
- threat
- 1.Qd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- Q(c);N_GUARD::S(F),XR(k)
- R(g);OGATE::QAR1(E),XQ(c)
- R(g);OGATE,P_PINS(F)::QAR1(E),XQ(c)
- S(a);S_CUTQ(c)::S(B)
- S(b);S_CUTQ(c)::S(B)
- P(h);S_CUTQ(c)::S(B)
- P(j);S_CUTQ(c)::S(B)
- P(j);S_CUTQ(c)::S(F),XR(k)
- Actual
- Q(E);
- Threat
- QAR1(E),XP(i)
- Vars
- S(a);S_CUTQ(c)::S(B)
- S(b);S_CUTQ(c)::S(B)
- P(h);S_CUTQ(c)::S(B)
- P(h);S_CUTQ(c)::S(F),XR(g)
- P(j);S_CUTQ(c)::S(B)
- P(j);S_CUTQ(c)::S(F),XR(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).