MESON Chess Problem Database

Problem Display
PID: 235251 (5K2/4B3/5R2/2Nk4/6P1/1PP3p1/2n2pP1/4N1Q1 w - - 0 1)

Heyl, Peter

Schach, 2009

5K2/4B3/5R2/2Nk4/6P1/1PP3p1/2n2pP1/4N1Q1

#2

10 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Rf5#
  • Tries
    • 1.Sf3?
      • threat
        • 2.c4#
      • 1...f1Q
        • 2.Rd6#
      • 1...f1B
        • 2.Rd6#
      • 1...Sa3
        • 2.Qd1#
      • 1...Se3!
    • 1.Rd6+?
      • 1...Ke5
        • 2.Sed3#
      • 1...Kxc5!
    • 1.c4+?
      • 1...Ke5
        • 2.Sf3#
      • 1...Kd4!
  • Keys
    • 1.Sed3!
      • threat
        • 2.Rd6#
      • 1...f1Q
        • 2.c4#
      • 1...f1R
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT::R1(H)
  • Tries
    • Try
      • S(A);
      • Threat
        • P(E)
      • Vars
        • P(b);::R1(H)
        • S(a);N_GUARD::QAR(B)
      • Refutation
        • S(a);
    • Try
      • R(H);CHECK
      • Vars
        • K(d);P-FLIGHT::S(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b),XS(G)
    • Try
      • P(E);CHECK
      • Vars
        • K(d);P-FLIGHT::S(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b)
  • Actual
    • S(A);
    • Threat
      • R1(H)
    • Vars
      • P(b);P_PINR(H)::P(E)
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