MESON Chess Problem Database

Problem Display
PID: 264045 (4B2k/6qr/K3Q3/4B3/8/8/6RP/6R1 w - - 0 1)

van Dijk, Johannes

Tijdschrift vd KNSB, 1943

4B2k/6qr/K3Q3/4B3/8/8/6RP/6R1

#2

7 + 3

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Rg8#
      • 2.Qg8#
    • 1...Qf6
      • 2.Rg8#
    • 1...Rxh2
      • 2.Rxh2#
  • Tries
    • 1.Rxg7?
      • threat
        • 2.Rg8#
        • 2.Qg8#
      • 1...Rxh2
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Qg8#
      • 1...Rh3
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Qxh3#
        • 2.Qg8#
      • 1...Rh4
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Qg8#
      • 1...Rh5
        • 2.Qg8#
      • 1...Rh6
        • 2.Qxh6#
      • 1...Rxg7!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Ba4#
        • 2.Bb5#
        • 2.Bh5#
        • 2.Bc6#
        • 2.Bg6#
        • 2.Bd7#
        • 2.Bf7#
      • 1...Qf6+
        • 2.Bc6#
      • 1...Rh6+
        • 2.Bg6#
      • 1...Kg8
        • 2.Bh5#
      • 1...Qxe5
        • 2.Rg8#
      • 1...Rxh2
        • 2.Bg6#
      • 1...Rh3
        • 2.Bg6#
      • 1...Rh4
        • 2.Bg6#
      • 1...Rh5
        • 2.Bg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,P_PINQ(F)::R1(B)
    • R(b);OGATE,XP(C)::R(B),XR(b)
  • Tries
    • Try
      • R(B);XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(F)
        • R(b);OGATEB,P_PINQ(F)::QAR2(F),XR(b)
      • Refutation
        • R(b);P_SPINR(b),XR(B)
  • Actual
    • Q(F);
    • Threat
      • DUALS(7)
    • Vars
      • Q(a);CHECK::QAR(F)+B(G)
      • R(b);CHECK::QAR(F)+B(G)
      • K(c);P-FLIGHT::QAR(F)+B(G)
      • Q(a);N_SPINQ(a),OGATE,XB(D)::R1(B)
      • R(b);XP(C)::QAR(F)+B(G)
      • R(b);::QAR(F)+B(G)
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