MESON Chess Problem Database

Problem Display
PID: 75612 (1b1Rb3/1n1p1Np1/BB2n1P1/2r3QK/3k1rRp/1PN1p1P1/1P2p1q1/8 w - - 0 1)

Pelle, Charles

Chess, 1958

1b1Rb3/1n1p1Np1/BB2n1P1/2r3QK/3k1rRp/1PN1p1P1/1P2p1q1/8

#2

12 + 13

56 The Problemist 2007
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qd5#
    • 1...Qh3
      • 2.Qd5#
    • 1...Qe4
      • 2.Sxe2#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qg1
      • 2.Qd5#
    • 1...Qf2
      • 2.Qd5#
    • 1...Qh2
      • 2.Qd5#
    • 1...Qxg3
      • 2.Qd5#
    • 1...Re4
      • 2.Qd5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Ba7
      • 2.Qe5#
    • 1...Sc7
      • 2.Qe5#
    • 1...Sd6
      • 2.Qe5#
    • 1...d6
      • 2.Qe5#
  • Tries
    • 1.Rxd7+?
      • 1...Qd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Bd6
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Bxd7!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Sb5#
      • 1...Qe4
        • 2.Sxe2#
      • 1...Qc6
        • 2.Sxe2#
      • 1...Re4
        • 2.Qd5#
      • 1...Be5
        • 2.Qd3#
        • 2.Qxe5#
      • 1...Sc7
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...d5
        • 2.Qd3#
      • 1...d6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::QAR1(F)
    • Q(b);N_GUARD,N_SPINR(e),P_SPINR(g),SBLOCK::S(C),XP(a)
    • Q(b);N_GUARD,N_SPINP(j)::QAR1(F),XQ(b)
    • Q(b);N_GUARD,XP(D)::QAR1(F)
    • R(e);S_CUTQ(b)::QAR1(F)
    • B(l);N_GUARD,N_PINQ(F)::QAB1(F),XB(l)
    • B(l);N_GUARD::QAB1(F)
    • S(h);S_CUTB(l)::QAB1(F)
    • S(i);N_SPINP(j),S_CUTB(l)::QAB1(F)
    • P(j);S_CUTB(l)::QAB1(F)
  • Tries
    • Try
      • R(L);CHECK,XP(j)
      • Vars
        • B(l);P_SPINB(l)::QAB1(F)
        • S(i);P_SPINS(i)::QAB1(F)
      • Refutation
        • B(m);XR(L)
  • Actual
    • Q(F);
    • Threat
      • S(C)
    • Vars
      • Q(b);N_GUARD,N_SPINR(e),P_SPINR(g)::S(C),XP(a)
      • Q(b);N_GUARD::S(C),XP(a)
      • R(e);S_CUTQ(b)::QAR1(F)
      • S(h);S_CUTB(l)::QAB1(F)
      • S(i);N_SPINP(j),S_CUTB(l)::QAB1(F)
      • P(j);N_PINQ(F)::QAR1(F)
      • P(j);S_CUTB(l)::QAB1(F)
HTML5 logo

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).