MESON Chess Problem Database

Problem Display
PID: 207668 (1R1NRB2/1rpb4/6p1/1P1k4/1ppN3r/2bp1P1p/8/1K4Q1 w - - 0 1)

Eyjolfsson, Eyjolfur

The Problemist, 1984

1R1NRB2/1rpb4/6p1/1P1k4/1ppN3r/2bp1P1p/8/1K4Q1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.fxe4#
  • Tries
    • 1.S4e6?
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Qg5#
      • 1...Rxb5
        • 2.Sxc7#
      • 1...Rd4
        • 2.Qg5#
      • 1...c5
        • 2.Qxc5#
      • 1...Bd4!
    • 1.Qg5+?
      • 1...Kxd4
        • 2.Bc5#
        • 2.Bg7#
        • 2.Qc5#
        • 2.Qe5#
      • 1...Bf5!
  • Keys
    • 1.S4c6!
      • threat
        • 2.Qc5#
      • 1...Rxb5
        • 2.Rxb5#
      • 1...Rd4
        • 2.Re5#
      • 1...Bd4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(f);OGATE::P(C),XR(f)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • K(g);P-FLIGHT::QAR2(B)
        • R(i);N_GUARD,XP(E)::S(D),XP(j)
        • R(f);S_CUTB(a)::QAR(B)
        • P(j);::QAR1(B),XP(j)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK
      • Refutation
        • B(k);P_SPINB(k)
  • Actual
    • S(D);
    • Threat
      • QAR1(B)
    • Vars
      • R(i);OGATE,XP(E)::R(F),XR(i)
      • R(f);S_CUTB(a)::R1(H)
      • B(a);N_GUARD::S(D),XP(d)
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