MESON Chess Problem Database

Problem Display
PID: 145497 (2KQ4/1pNRpB2/1Rr3p1/8/3P4/PPk5/8/2B1N3 w - - 0 1)

Nietvelt, Gustaaf Josephus

Magyar Sakkvilag, 1932

2KQ4/1pNRpB2/1Rr3p1/8/3P4/PPk5/8/2B1N3

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sb5#
    • 1...Rf6
      • 2.Sb5#
    • 1...Rxc7+
      • 2.Rxc7#
      • 2.Qxc7#
  • Tries
    • 1.Rxe7?
      • threat
        • 2.Re3#
      • 1...Rxc7+
        • 2.Rxc7#
      • 1...Rd6
        • 2.Sb5#
      • 1...Re6!
    • 1.Qxe7?
      • threat
        • 2.Qb4#
        • 2.Qe3#
      • 1...Rxb6
        • 2.Qc5#
        • 2.Qe3#
      • 1...Rd6
        • 2.Sb5#
        • 2.Qe3#
      • 1...Rc4
        • 2.Qe3#
      • 1...Rc5
        • 2.Qxc5#
        • 2.Qe3#
      • 1...Re6
        • 2.Qb4#
        • 2.Qc5#
      • 1...Rxc7+!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh3#
      • 1...Rxc7+
        • 2.Rxc7#
      • 1...Rd6
        • 2.Sb5#
      • 1...Re6
        • 2.Sd5#
      • 1...Rf6
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);N_PINS(G)::S(G)
  • Tries
    • Try
      • R(H);XP(e)
      • Threat
        • R(H)
      • Vars
        • R(b);CHECK,OGATE,XS(G)::R(H),XR(b)
        • R(b);N_PINS(G)::S(G)
      • Refutation
        • R(b);N_PINS(G)
    • Try
      • Q(K);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR2(K)
      • Refutation
        • R(b);CHECK,XS(G)
  • Actual
    • Q(K);
    • Threat
      • QAR(K)
    • Vars
      • R(b);CHECK,OGATE,XS(G)::R(H),XR(b)
      • R(b);N_PINS(G)::S(G)
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