MESON Chess Problem Database
Problem Display
PID: 31471 (3B4/rp4p1/p1k1P1Kp/3N1N1Q/1P1pB3/1P3p2/1qb5/2R5 w - - 0 1)
Easter, Norris
The Problemist, 1927
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...d3
- 2.Sc3#
- 1...b5
- 2.Sde3#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sde7#
- 1...b6
- 2.Sc7#
- 1...d3
- Tries
- 1.Kh7?
- threat
- 2.Qe8#
- 1...Kb5
- 2.Qe8#
- 1...b6
- 2.Sc7#
- 1...b5
- 2.Sde3#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sde7#
- 1...g6!
- threat
- 1.Sxd4+?
- 1...Kd6
- 2.Bc7#
- 2.Be7#
- 2.Qh2#
- 1...Qxd4!
- 1...Kd6
- 1.Rxc2+?
- 1...Kb5
- 2.Sd6#
- 2.Bd3#
- 2.Rc5#
- 1...Qc3
- 2.Sxc3#
- 1...Qxc2!
- 1...Kb5
- 1.Kh7?
- Keys
- 1.Kxg7!
- threat
- 2.Qe8#
- 1...d3+
- 2.Sc3#
- 1...b5+
- 2.Sde7#
- 1...b6+
- 2.Sc7#
- 1...Kb5
- 2.Qe8#
- threat
- 1.Kxg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- P(d);::B(D)+S(E)
- P(i);SBLOCK::B(D)+S(E)
- Tries
- Try
- K(I);S_FLIGHT
- Threat
- QAB(G)
- Vars
- K(f);N_SPINB(b),S_FLIGHT::QAB(G)
- P(i);SBLOCK::B(D)+S(E)
- Refutation
- P(j);
- Try
- S(F);CHECK,P_SPINB(D),XP(d)
- Refutation
- Q(a);XS(F)
- Try
- R(A);CHECK,XB(b)
- Vars
- Q(a);P_SPINQ(a)::B(D)+S(E),XQ(a)
- Refutation
- Q(a);XR(A)
- Try
- Actual
- K(I);P-FLIGHT,XP(j)
- Threat
- QAB(G)
- Vars
- P(d);CHECK::B(D)+S(E)
- P(i);CHECK,SBLOCK::B(D)+S(E),DCHECK
- P(i);CHECK,SBLOCK::B(D)+S(E)
- K(f);N_SPINB(b),S_FLIGHT::QAB(G)
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).