MESON Chess Problem Database

Problem Display
PID: 32520 (BR1Q1b2/1nR5/r1qP4/p2kN3/pP1N1P2/3P1K2/8/6B1 w - - 0 1)

Nietvelt, Gustaaf Josephus

Swiat Szachowy, 1928

(First published on Sat Sep 8 1928)

BR1Q1b2/1nR5/r1qP4/p2kN3/pP1N1P2/3P1K2/8/6B1

#2

12 + 7

20 De Problemist 1929
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.Rc5#
    • 1...Qc4
      • 2.dxc4#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qxd6
      • 2.Rc5#
    • 1...Bxd6
      • 2.Qg8#
    • 1...Sxd6
      • 2.Rb5#
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qg5#
      • 1...Qxc4
        • 2.dxc4#
      • 1...Qxd6
        • 2.Rc5#
      • 1...Bxd6
        • 2.Qg8#
      • 1...Sxd6
        • 2.Rb5#
      • 1...Sxd8
        • 2.Rb5#
      • 1...Qd7
        • 2.Rc5#
      • 1...Qe8
        • 2.Rc5#
      • 1...Bh6
        • 2.Qg8#
      • 1...Be7
        • 2.Qg8#
      • 1...Bg7
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE,P_SPINS(f)::R1(I)
    • Q(e);OGATE,P_SPINS(f)::P(B),XQ(e)
    • Q(e);OGATE,P_SPINS(f)::R1(I),XQ(e)
    • Q(e);OGATE,P_SPINQ(e),P_SPINS(f),XP(H)::R1(I)
    • B(g);OGATE,P_SPINB(g),SBLOCK,XP(H)::QAB(L)
    • S(f);OGATE,P_SPINQ(e),P_SPINS(f),XP(H)::R(K)
  • Actual
    • S(G);
    • Threat
      • QAR(L)
    • Vars
      • Q(e);OGATE,P_SPINS(f),XS(G)::P(B),XQ(e)
      • Q(e);OGATE,P_SPINQ(e),P_SPINS(f),XP(H)::R1(I)
      • B(g);OGATE,P_SPINB(g),XP(H)::QAB(L)
      • S(f);OGATE,P_SPINQ(e),P_SPINS(f),XP(H)::R(K)
      • S(f);OGATE,P_SPINQ(e),XQ(L)::R(K)
      • Q(e);OGATE,P_SPINS(f)::R1(I)
      • B(g);OGATE::QAB(L)
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