MESON Chess Problem Database

Problem Display
PID: 221354 (8/2pK4/N3Rp2/1r1k1pbR/7r/2pB1N1b/4P3/3Q4 w - - 0 1)

Eerkes, Allard Pieter

Suomen Shakki, 1936

8/2pK4/N3Rp2/1r1k1pbR/7r/2pB1N1b/4P3/3Q4

#2

8 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Be4#
    • 1...Bf4
      • 2.e4#
    • 1...f4
      • 2.Bxb5#
    • 1...c5
      • 2.Sc7#
      • 2.Rd6#
    • 1...c6
      • 2.Rd6#
  • Tries
    • 1.Bc2+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Bd2!
    • 1.Bxb5+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Bd2!
    • 1.Qb3+?
      • 1...Rc4
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...Rxb3!
    • 1.e4+?
      • 1...fxe4
        • 2.Bf1#
        • 2.Be2#
        • 2.Bxb5#
      • 1...Rxe4!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Sxc7#
      • 1...f4+
        • 2.Bf5#
      • 1...Rb7
        • 2.Rc5#
      • 1...Bf4
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(c);SBLOCK::QAR(A)+B(C),DCHECK
    • B(g);P_SPINP(f),S_CUTR(c)::P(B)
    • P(f);P_PINR(G),P_SPINB(g),S_CUTR(c)::QAR(A)+B(C),XR(d)
    • P(i);N_GUARD::R1(G)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(A)
        • R(c);N_GUARD,P_SPINR(c)::QAR1(A),XR(c)
      • Refutation
        • B(g);P_SPINB(g),P_SPINP(f)
    • Try
      • B(C);CHECK,XR(d)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(A),XR(c)
      • Refutation
        • B(g);P_SPINB(g),P_SPINP(f)
    • Try
      • Q(A);CHECK
      • Refutation
        • R(d);XQ(A)
    • Try
      • P(B);CHECK
      • Refutation
        • R(c);XP(B)
  • Actual
    • R(G);
    • Threat
      • S(F),XP(i)
    • Vars
      • P(f);CHECK,P_SPINB(g),S_CUTR(c)::QAR(A)+B(C)
      • R(d);N_GUARD::R1(G)
      • B(g);P_SPINP(f),S_CUTR(c)::P(B)
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