MESON Chess Problem Database

Problem Display
PID: 276865 (5R1n/5bp1/3R2pb/1Q1pPkB1/3PNNp1/8/K7/3B4 w - - 0 1)

Ellerman, Arnoldo

2nd Comm., To Mat, 1961

5R1n/5bp1/3R2pb/1Q1pPkB1/3PNNp1/8/K7/3B4

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qd3#
    • 1...dxe4+
      • 2.e6#
  • Tries
    • 1.Se2?
      • threat
        • 2.S2g3#
      • 1...dxe4+
        • 2.e6#
      • 1...Bxg5
        • 2.S4g3#
      • 1...g3
        • 2.S2xg3#
      • 1...Kxe4!
    • 1.Bc2?
      • threat
        • 2.Qd7#
      • 1...dxe4+
        • 2.e6#
      • 1...Bxg5!
    • 1.Bxg4+?
      • 1...Kxe4
        • 2.Qd3#
      • 1...Kxg4!
    • 1.Rf6+?
      • 1...Kxe4
        • 2.Qd3#
      • 1...gxf6!
    • 1.Rxf7+?
      • 1...Kxe4
        • 2.Qd3#
      • 1...Sxf7!
    • 1.Qf1?
      • 1...dxe4+
        • 2.Se6#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Bxg5
        • 2.Sg3#
      • 1...g3!
    • 1.e6?
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Bxg5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sg3#
      • 1...Kxe4
        • 2.Qb1#
      • 1...dxe4
        • 2.Qf1#
      • 1...g3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINB(f),OGATEB,S_FLIGHT,XS(D)::QAB1(F)
    • P(b);CHECK,SBLOCK,XS(D)::QAR(F)+P(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • P(b);CHECK,SBLOCK,XS(D)::QAR(F)+P(G)
        • B(e);SBLOCK,XB(H)::S(D)
        • P(a);::S(E),XP(a)
      • Refutation
        • K(c);N_SPINB(f),S_FLIGHT,XS(D)
    • Try
      • B(A);
      • Threat
        • QAB(F)
      • Vars
        • P(b);CHECK,P_SPINP(b),XS(D)::QAR(F)+P(G)
      • Refutation
        • B(e);XB(H)
    • Try
      • B(A);CHECK,XP(a)
      • Vars
        • K(c);N_GUARD,N_SPINB(f),S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • K(c);N_SPINB(f),S_FLIGHT,XB(A)
    • Try
      • R(I);CHECK,N_PINB(f)
      • Vars
        • K(c);S_CUTP(g),S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • P(g);XR(I)
    • Try
      • R(J);CHECK,XB(f)
      • Vars
        • K(c);S_CUTS(h),S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • S(h);XR(J)
    • Try
      • Q(F);
      • Vars
        • P(b);CHECK,SBLOCK,XS(D)::QAR(F)+S(E)
        • K(c);N_SPINB(f),OGATEB,S_FLIGHT,XS(D)::QAB1(F)
        • B(e);SBLOCK,XB(H)::S(D)
      • Refutation
        • P(a);
    • Try
      • P(G);P_PINP(b)
      • Threat
        • QAR2(F),XP(b)
      • Vars
        • K(c);N_SPINB(f),N_SPINP(b),OGATEB,S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • B(e);XB(H)
  • Actual
    • S(E);
    • Threat
      • S(D)
    • Vars
      • K(c);N_SPINB(f),OGATEB,S_FLIGHT,XS(D)::QAB(F)
      • P(b);P_PINS(E),SBLOCK,XS(D)::QAR(F)
      • P(a);::S(D),XP(a)
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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).