MESON Chess Problem Database

Problem Display
PID: 83534 (2R1K3/4n3/p1N2bp1/6r1/P1k3N1/2p1QP2/b1P1r3/5Bn1 w - - 0 1)

Ellerman, Arnoldo

England, 1920

2R1K3/4n3/p1N2bp1/6r1/P1k3N1/2p1QP2/b1P1r3/5Bn1

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qd3#
    • 1...Re5
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
  • Tries
    • 1.Sa5+?
      • 1...Kd5
        • 2.Rd8#
      • 1...Kb4!
    • 1.Sxe7+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Kb4!
    • 1.Qc5+?
      • 1...Rxc5
        • 2.Se3#
      • 1...Kxc5!
    • 1.Qe4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kc5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Se3#
      • 1...Sd5+
        • 2.Sce5#
      • 1...Sf5+
        • 2.Se7#
      • 1...Kd5
        • 2.Sb4#
      • 1...Rxg4
        • 2.Sxe7#
      • 1...Re5
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK::QAB1(C)
    • R(f);S_CUTB(h)::QAR1(C)
    • B(h);N_GUARD::QAR1(C),XB(h)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_SPINR(c),S_FLIGHT::R(H)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT
    • Try
      • S(G);CHECK,XS(j)
      • Vars
        • R(f);N_GUARD::QAR1(C),XR(f)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • R(f);SBLOCK,XQ(C)::S(F)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(C),XB(h)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • S(F)
    • Vars
      • S(j);CHECK,SBLOCK::R(H)+S(G),DCHECK
      • S(j);CHECK,S_CUTR(f)::R(H)+S(G)
      • K(e);N_SPINR(c),S_FLIGHT::S(G)
      • R(f);N_GUARD,XS(F)::R(H)+S(G),XS(j)
      • R(f);S_CUTB(h)::QAR1(C)
      • B(h);N_GUARD::QAR1(C),XB(h)
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).