MESON Chess Problem Database

Problem Display
PID: 235726 (7K/7B/4R3/1Pbk4/4R3/3P4/3p4/3q3Q w - - 0 1)

Sheratsov, V

Zadachi i Etyudi, 2002

7K/7B/4R3/1Pbk4/4R3/3P4/3p4/3q3Q

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Qh5#
    • 1...Qb3
      • 2.Qh5#
    • 1...Qa4
      • 2.Qh5#
    • 1...Qh5
      • 2.Qxh5#
    • 1...Qb1
      • 2.Qh5#
    • 1...Qc1
      • 2.Qh5#
    • 1...Qe1
      • 2.Qh5#
    • 1...Bd4+
      • 2.R4e5#
  • Keys
    • 1.Bg8!
      • threat
        • 2.Ra6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qa1+
        • 2.Rf6#
      • 1...Qxh1+
        • 2.Rh6#
      • 1...Bd4+
        • 2.R4e5#
      • 1...Bg1
        • 2.Rc6#
      • 1...Bf2
        • 2.Rc6#
      • 1...Ba3
        • 2.Rc6#
      • 1...Be3
        • 2.Rc6#
      • 1...Bb4
        • 2.Rc6#
      • 1...Bb6
        • 2.Rc6#
      • 1...Bd6
        • 2.R6e5#
      • 1...Ba7
        • 2.Rc6#
      • 1...Be7
        • 2.Rc6#
      • 1...Bf8
        • 2.Rc6#
      • 1...Qf3
        • 2.Rf6#
      • 1...Qg4
        • 2.Rxg4#
      • 1...Qf1
        • 2.Rf6#
      • 1...Qg1
        • 2.Rg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 16
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::QAR(A)
    • Q(a);N_GUARD,P_PINB(F)::QAR(A),XQ(a)
    • B(c);CHECK,SBLOCK::QAB(A)+R(C),DCHECK
  • Actual
    • B(F);
    • Threat
      • DUALS(6)
    • Vars
      • Q(a);CHECK,N_GUARD::QAR(A),XQ(a)
      • Q(a);CHECK::B(F)+R(E)
      • Q(a);CHECK,XQ(A)::B(F)+R(E)
      • B(c);CHECK,SBLOCK::QAB(A)+R(C),DCHECK
      • B(c);::B(F)+R(E)
      • B(c);SBLOCK::B(F)+R(E),DCHECK
      • Q(a);::B(F)+R(E)
      • Q(a);N_GUARD::QAB(A)+R(C),XQ(a)
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