MESON Chess Problem Database

Problem Display
PID: 233888 (1b3q2/n1n1prP1/1N3Q1p/r3B2K/p1P5/1R1PkP1b/R5pN/8 w - - 0 1)

Ellerman, Arnoldo

2nd HM., Skakbladet, 1957

1b3q2/n1n1prP1/1N3Q1p/r3B2K/p1P5/1R1PkP1b/R5pN/8

#2

11 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5+
      • 2.Qxe5#
    • 1...Ra6
      • 2.Bd4#
      • 2.Bf4#
    • 1...Bg4+
      • 2.Sxg4#
    • 1...Bf5
      • 2.Qxh6#
    • 1...Sab5
      • 2.Bf4#
    • 1...Scb5
      • 2.Sd5#
    • 1...Sd5
      • 2.Bd4#
    • 1...a3
      • 2.d4#
  • Tries
    • 1.Sd5+?
      • 1...Sxd5
        • 2.Bd4#
      • 1...Rxd5!
  • Keys
    • 1.Rc3!
      • threat
        • 2.d4#
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...Bg4+
        • 2.Sxg4#
      • 1...Bf5
        • 2.Qxh6#
      • 1...Sab5
        • 2.Bf4#
      • 1...Scb5
        • 2.Sd5#
      • 1...Sd5
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(e);CHECK,OGATE,XB(G)::QAR2(J),XR(e)
    • B(c);CHECK,N_GUARD::S(B),XB(c)
    • B(c);N_PINB(G),S_CUTR(j)::QAB(J),XP(f)
    • S(g);N_PINB(G)::B(G)
    • S(h);N_GUARD,N_PINB(G),S_CUTR(e)::S(I)
    • S(h);N_PINB(G)::B(G)
    • P(d);N_GUARD::R(C)+P(D)
  • Tries
    • Try
      • S(I);CHECK,N_SPINB(G)
      • Vars
        • S(h);XS(I)::B(G)
      • Refutation
        • R(e);P_PINB(G),XS(I)
  • Actual
    • R(C);
    • Threat
      • R(C)+P(D)
    • Vars
      • R(e);CHECK,OGATE,XB(G)::QAR2(J),XR(e)
      • B(c);CHECK,N_GUARD::S(B),XB(c)
      • B(c);N_PINB(G),S_CUTR(j)::QAB(J),XP(f)
      • S(g);N_PINB(G)::B(G)
      • S(h);N_GUARD,N_PINB(G),S_CUTR(e)::S(I)
      • S(h);N_PINB(G)::B(G)
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