MESON Chess Problem Database

Problem Display
PID: 32369 (8/2nb4/1R6/3p4/k5qQ/4R3/2P2r2/K2BB3 w - - 0 1)

Nietvelt, Gustaaf Josephus

Shakhmaty, 1927

8/2nb4/1R6/3p4/k5qQ/4R3/2P2r2/K2BB3

#2

7 + 6

20 De Problemist 1928

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Qxb4#
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Rxc2
      • 2.Bxc2#
    • 1...Rf3
      • 2.c4#
    • 1...Sb5
      • 2.Ra6#
  • Tries
    • 1.Ka2?
      • threat
        • 2.Ra3#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rf3
        • 2.c4#
      • 1...Sb5
        • 2.Ra6#
      • 1...Qc4+!
    • 1.Rb4+?
      • 1...Qxb4
        • 2.Qxb4#
      • 1...Ka5!
    • 1.Qxg4+?
      • 1...Rf4
        • 2.c4#
      • 1...d4
        • 2.Qxd4#
      • 1...Bxg4!
    • 1.c4+?
      • 1...Rc2
        • 2.Bxc2#
      • 1...Qxd1+!
  • Keys
    • 1.Kb2!
      • threat
        • 2.Ra3#
      • 1...Qb4+
        • 2.Qxb4#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rf3
        • 2.c4#
      • 1...Sb5
        • 2.Ra6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATE::QAR1(F),XQ(c)
    • Q(c);CHECK,OGATE::QAR(F),XQ(c)
    • R(a);OGATE,P_SPINR(a),XP(D)::B(B),XR(a)
    • R(a);N_GUARD::B(B)+P(D)
    • S(e);N_GUARD,SBLOCK::R(G)
  • Tries
    • Try
      • K(A);P-FLIGHT,P_SPINP(D)
      • Threat
        • R1(E)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(D)::B(B),XR(a)
        • R(a);N_PINP(D)::B(B)+P(D)
        • S(e);N_GUARD,SBLOCK::R(G)
      • Refutation
        • Q(c);CHECK
    • Try
      • R(G);CHECK,N_PINQ(c)
      • Vars
        • Q(c);OGATE,P_SPINQ(c),XR(G)::QAR1(F),XQ(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);CHECK,XQ(c)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(B)+P(D)
        • P(d);P_SPINP(d)::QAR(F),XP(d)
      • Refutation
        • B(f);XQ(F)
    • Try
      • P(D);CHECK,N_PINQ(c)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(B),XR(a)
      • Refutation
        • Q(c);CHECK,XB(B)
  • Actual
    • K(A);P_SPINP(D),S_FLIGHT
    • Threat
      • R1(E)
    • Vars
      • Q(c);CHECK,OGATE::QAR1(F),XQ(c)
      • Q(c);CHECK,OGATE::QAR(F),XQ(c)
      • R(a);CHECK,OGATE,P_SPINR(a),XP(D)::B(B),XR(a)
      • R(a);N_PINP(D)::B(B)+P(D)
      • S(e);N_GUARD,SBLOCK::R(G)
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