MESON Chess Problem Database
Problem Display
PID: 248909 (6Q1/B3p3/2B5/2qppp2/n2Pk2K/R6p/4PR2/1b1n1r2 w - - 0 1)
Eerkes, Allard Pieter
Die Schwalbe, 1971
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Kxd4
- 2.Qxd5#
- 1...Qb4
- 2.Bxd5#
- 2.Qxd5#
- 1...Qb6
- 2.Qxd5#
- 1...Qxa7
- 2.Qxd5#
- 1...Qc1
- 2.Bxd5#
- 2.Qxd5#
- 1...Qc2
- 2.Bxd5#
- 2.Qxd5#
- 1...exd4
- 2.Qe6#
- 1...Kxd4
- Tries
- 1.Qg2+?
- 1...Kxd4
- 2.Qxd5#
- 1...hxg2!
- 1...Kxd4
- 1.Qg3?
- threat
- 2.Qxe5#
- 1...Kxd4
- 2.Rxa4#
- 1...Qxd4
- 2.Qf3#
- 1...exd4
- 2.Qf4#
- 1...Qd6
- 2.Qf3#
- 1...f4!
- threat
- 1.Qb8?
- threat
- 2.Qxe5#
- 1...Kxd4
- 2.Qb4#
- 1...exd4
- 2.Qf4#
- 1...Qd6
- 2.Qxb1#
- 1...Qxd4!
- threat
- 1.Qg2+?
- Keys
- 1.Qe6!
- threat
- 2.Qxe5#
- 1...Kxd4
- 2.Qxd5#
- 1...Qxd4
- 2.Qxf5#
- 1...Qd6
- 2.Qxf5#
- threat
- 1.Qe6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- K(f);N_SPINP(h),P-FLIGHT,P_SPINQ(g),XP(D)::QAR1(H),XP(h)
- Q(g);N_GUARD::QAB1(H),XP(h)
- Q(g);N_GUARD,XB(G)::QAB1(H),XP(h)
- P(i);OGATEB,SBLOCK,XP(D)::QAR2(H)
- Tries
- Try
- Q(H);CHECK
- Vars
- K(f);N_SPINP(h),OGATE,P-FLIGHT,P_SPINQ(g),XP(D)::QAR1(H),XP(h)
- Refutation
- P(d);XQ(H)
- Try
- Q(H);
- Threat
- QAR1(H),XP(i)
- Vars
- K(f);N_SPINP(h),OGATEB,P-FLIGHT,P_SPINQ(g),XP(D)::R(C),XS(e)
- Q(g);XP(D)::QAB1(H)
- P(i);N_GUARD,SBLOCK,XP(D)::QAR1(H)
- Q(g);::QAB1(H)
- Refutation
- P(j);
- Try
- Q(H);
- Threat
- QAR1(H),XP(i)
- Vars
- K(f);N_SPINP(h),OGATEB,P-FLIGHT,P_SPINQ(g),XP(D)::QAR2(H)
- P(i);OGATE,SBLOCK,XP(D)::QAR1(H)
- Q(g);N_GUARD::QAB(H),XB(a)
- Refutation
- Q(g);XP(D)
- Try
- Actual
- Q(H);
- Threat
- QAR1(H),XP(i)
- Vars
- K(f);N_SPINP(h),P-FLIGHT,P_SPINQ(g),XP(D)::QAR1(H),XP(h)
- Q(g);XP(D)::QAB1(H),XP(j)
- Q(g);::QAB1(H),XP(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).