MESON Chess Problem Database

Problem Display
PID: 234378 (2K2n2/2P1R1p1/6p1/p2ppkP1/r6R/4PB1N/b3Q3/b2qr3 w - - 0 1)

Ellerman, Arnoldo

Problemas, 1954

2K2n2/2P1R1p1/6p1/p2ppkP1/r6R/4PB1N/b3Q3/b2qr3

#2

9 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Rf7#
    • 1...d4
      • 2.Be4#
      • 2.e4#
    • 1...e4
      • 2.Bg4#
      • 2.Rf4#
  • Tries
    • 1.Bg4+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Be6#
        • 2.Bd7#
      • 1...Rxg4!
    • 1.Rf4+?
      • 1...exf4
        • 2.Bg4#
      • 1...Rxf4!
    • 1.e4+?
      • 1...dxe4
        • 2.Bg4#
      • 1...Rxe4!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Rf7#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#
      • 1...d4
        • 2.Be4#
      • 1...e4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(l);SBLOCK::R(H)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • R(e);XB(C)
    • Try
      • R(E);CHECK
      • Vars
        • P(h);XR(E)::B(C)
      • Refutation
        • R(e);XR(E)
    • Try
      • P(B);CHECK
      • Vars
        • P(g);XP(B)::B(C)
      • Refutation
        • R(e);XP(B)
  • Actual
    • Q(A);
    • Threat
      • R(H)
    • Vars
      • S(l);N_GUARD::QAB1(A)
      • P(g);N_GUARD,S_CUTR(e)::B(C)
      • P(h);N_GUARD,S_CUTR(e)::R1(E)
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