MESON Chess Problem Database

Problem Display
PID: 246995 (3B4/6K1/8/7k/6R1/4N3/8/5Bq1 w - - 0 1)

Kolpakov, Viktor Sergeevich

Uralski Problemist, 1997

3B4/6K1/8/7k/6R1/4N3/8/5Bq1

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Rh4#
    • 1...Qxf1
      • 2.Rh4#
  • Tries
    • 1.Rg5+?
      • 1...Kh4
        • 2.Sf5#
      • 1...Qxg5+!
  • Keys
    • 1.Be2!
      • threat
        • 2.Rxg1#
        • 2.Rg2#
        • 2.Rg3#
      • 1...Qa1+
        • 2.Rd4#
      • 1...Qxg4+
        • 2.Bxg4#
      • 1...Qxe3
        • 2.Rh4#
      • 1...Qf2
        • 2.Rh4#
      • 1...Qh2
        • 2.Rg2#
        • 2.Rh4#
      • 1...Qb1
        • 2.Rg1#
        • 2.Rg2#
        • 2.Rg3#
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rd4#
        • 2.Re4#
        • 2.Rf4#
        • 2.Rh4#
        • 2.Rg6#
      • 1...Qc1
        • 2.Rg1#
        • 2.Rg2#
        • 2.Rg3#
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rd4#
        • 2.Re4#
        • 2.Rf4#
        • 2.Rh4#
        • 2.Rg6#
      • 1...Qd1
        • 2.Rh4#
      • 1...Qe1
        • 2.Rh4#
      • 1...Qf1
        • 2.Rh4#
      • 1...Qh1
        • 2.Rg2#
        • 2.Rh4#
      • 1...Qg2
        • 2.Rxg2#
      • 1...Qg3
        • 2.Rxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_PINR(C),XS(B)::R1(C)
    • Q(a);N_PINR(C),XB(A)::R1(C)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(B)
      • Refutation
        • Q(a);CHECK,XR(C)
  • Actual
    • B(A);
    • Threat
      • DUALS(3)
    • Vars
      • Q(a);CHECK,N_PINR(C)::B(A)+R(C)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::B(A),XQ(a)
      • Q(a);N_PINR(C),XS(B)::B(A)+R(C),DCHECK
      • Q(a);N_PINR(C)::B(A)+R(C),DCHECK
      • Q(a);::B(A)+R(C),XQ(a)
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