MESON Chess Problem Database

Problem Display
PID: 242669 (3n2Q1/3N3R/P1k3qR/1N6/8/K7/b7/5B2 w - - 0 1)

Hartong, Jan

Tijdschrift vd KNSB, 1929

3n2Q1/3N3R/P1k3qR/1N6/8/K7/b7/5B2

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Rxd6#
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Se6
      • 2.Qa8#
  • Tries
    • 1.Bg2+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Kxb5!
    • 1.Rxg6+?
      • 1...Se6
        • 2.Qa8#
      • 1...Be6!
    • 1.Qxg6+?
      • 1...Kd5
        • 2.Rh5#
        • 2.Qd3#
        • 2.Qf5#
        • 2.Qg2#
      • 1...Be6
        • 2.Qe4#
        • 2.Qg2#
      • 1...Se6!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Qd5#
      • 1...Qd6+
        • 2.Rxd6#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...Sf7
        • 2.Qc8#
      • 1...Qe6
        • 2.Qg2#
      • 1...Se6
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(c);CHECK,OGATE::R1(E),XQ(c)
    • B(a);N_GUARD::QAR2(H)
    • B(a);N_GUARD::QAR2(H),XB(a)
    • S(d);N_SPINQ(c),OGATE::QAB(H)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(H),XB(a)
      • Refutation
        • K(b);N_SPINQ(c),S_FLIGHT,XS(C)
    • Try
      • R(E);CHECK,XQ(c)
      • Vars
        • S(d);OGATE,P_SPINS(d)::QAB(H)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(H);CHECK,XQ(c)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • B(A);
    • Threat
      • QAB1(H)
    • Vars
      • Q(c);CHECK,OGATE::R1(E),XQ(c)
      • B(a);OGATE,XB(A)::QAR2(H),XB(a)
      • S(d);OGATE::QAR2(H)
      • Q(c);OGATE::QAB(H)
      • S(d);N_SPINQ(c),OGATE::QAB(H)
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