MESON Chess Problem Database

Problem Display
PID: 83677 (K2n4/3p1r2/5NQ1/2P3p1/3PpRP1/1B1k1b2/4RPN1/4B1b1 w - - 0 1)

Ellerman, Arnoldo

Problemas, 1962

K2n4/3p1r2/5NQ1/2P3p1/3PpRP1/1B1k1b2/4RPN1/4B1b1

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2
      • 2.Qxe4#
    • 1...Bxg4
      • 2.Qxe4#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Rd2#
      • 1...Kxe2
        • 2.Qa6#
      • 1...Bxe2
        • 2.Qxe4#
      • 1...Kxd4!
    • 1.Rfxe4?
      • threat
        • 2.Re3#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Bxe2
        • 2.Rf4#
      • 1...Bxf2!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Rd2#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Kxe2
        • 2.Qa6#
      • 1...Kxd4
        • 2.Qd6#
      • 1...Bxe2
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD,XR(B)::QAB1(K),XP(d)
    • B(c);N_GUARD,XP(H)::QAB1(K),XP(d)
  • Tries
    • Try
      • S(J);
      • Threat
        • R1(B)
      • Vars
        • K(b);N_SPINP(d),S_FLIGHT,XR(B)::QAB(K)
        • B(c);N_GUARD,XR(B)::QAB1(K),XP(d)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
    • Try
      • R(G);P_SPINR(G),XP(d)
      • Threat
        • R1(B)
      • Vars
        • B(c);CHECK,OGATE,P_SPINB(c),XR(G)::QAB1(K),XB(c)
        • B(c);N_PINR(G),SBLOCK,XR(B)::QAB(K)+R(G)
      • Refutation
        • B(a);XP(C)
  • Actual
    • S(J);P_SPINS(J),XP(d)
    • Threat
      • R1(B)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(J)::QAB1(K),XB(c)
      • K(b);S_FLIGHT,XR(B)::QAB(K)
      • K(b);OGATEB,P-FLIGHT,XP(F)::QAR2(K)
      • B(c);N_PINS(J),SBLOCK,XR(B)::QAB(K)+S(J)
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).