MESON Chess Problem Database

Problem Display
PID: 137114 (1R1b4/3Kp3/2P1Rp2/3N3Q/1Pk2P2/1N1q4/P2BP1B1/7b w - - 0 1)

Ellerman, Arnoldo

Comm., Magyar Sakkvilag, 1933

1R1b4/3Kp3/2P1Rp2/3N3Q/1Pk2P2/1N1q4/P2BP1B1/7b

#2

13 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Se3#
    • 1...Qc2
      • 2.Se3#
    • 1...Qxe2
      • 2.Qxe2#
    • 1...Qe4
      • 2.Rxe4#
    • 1...Qf5
      • 2.Se3#
    • 1...Qg6
      • 2.Se3#
    • 1...Qh7
      • 2.Se3#
    • 1...Qxb3
      • 2.Re4#
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qg3
      • 2.Re4#
    • 1...Qxd5+
      • 2.Qxd5#
  • Tries
    • 1.Re4+?
      • 1...Qd4
        • 2.Rxd4#
      • 1...Qxe4!
  • Keys
    • 1.c7!
      • threat
        • 2.Rc6#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Qxe2
        • 2.Qxe2#
      • 1...Qxb3
        • 2.Re4#
      • 1...Qf5
        • 2.Se3#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Qh3
        • 2.Sb6#
      • 1...Qd4
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_PINS(H)::S(H)
    • Q(b);N_PINS(H),OGATE,XP(C)::QAB(I),XQ(b)
    • Q(b);N_GUARD,N_PINS(H)::R(K),XQ(b)
    • Q(b);N_PINS(H),P_PINR(K)::S(H)
    • Q(b);N_GUARD,N_PINS(H),XS(E)::R(K)
    • Q(b);N_PINS(H)::S(H),XQ(b)
    • Q(b);N_GUARD,N_PINS(H)::R(K)
    • Q(b);CHECK,OGATE,XS(H)::QAB1(I),XQ(b)
  • Tries
    • Try
      • R(K);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::R1(K),XQ(b)
      • Refutation
        • Q(b);N_PINS(H),XR(K)
  • Actual
    • P(J);
    • Threat
      • R(K)
    • Vars
      • Q(b);CHECK,OGATE,XS(H)::QAB1(I),XQ(b)
      • Q(b);N_PINS(H),OGATE,XP(C)::QAB(I),XQ(b)
      • Q(b);N_GUARD,N_PINS(H),XS(E)::R(K)
      • Q(b);N_PINS(H),P_PINR(K)::S(H)
      • Q(b);N_PINS(H)::S(H),XQ(b)
      • Q(b);SBLOCK::S(E)
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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).