MESON Chess Problem Database

Problem Display
PID: 245269 (8/1R6/1Q6/K7/B3b3/8/4r3/k7 w - - 0 1)

Fomichev, Evgeny Vasilevich

Sa ogneupory, 1989

8/1R6/1Q6/K7/B3b3/8/4r3/k7

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qb2#
    • 1...Rb2
      • 2.Qxb2#
    • 1...Rc2
      • 2.Qb1#
    • 1...Re3
      • 2.Qb2#
    • 1...Bb1
      • 2.Qxb1#
    • 1...Bh1
      • 2.Qb1#
    • 1...Bc2
      • 2.Qb2#
    • 1...Bg2
      • 2.Qb1#
    • 1...Bf3
      • 2.Qb1#
    • 1...Bd5
      • 2.Qb1#
    • 1...Bc6
      • 2.Qb1#
  • Tries
    • 1.Qd4+?
      • 1...Rb2
        • 2.Qxb2#
      • 1...Ka2!
    • 1.Qf6+?
      • 1...Rb2
        • 2.Qxb2#
      • 1...Ka2!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Qb1#
        • 2.Qb2#
      • 1...Ka2
        • 2.Qb2#
      • 1...Rxc2
        • 2.Qb1#
      • 1...Bxc2
        • 2.Qb2#
      • 1...Bxb7
        • 2.Qb1#
      • 1...Re1
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::QAB1(C)
    • R(b);N_GUARD::QAB1(C),XR(b)
    • R(b);S_CUTB(c)::QAR1(C)
    • B(c);N_GUARD::QAR1(C),XB(c)
    • B(c);N_GUARD::QAR1(C)
    • B(c);S_CUTR(b)::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • R(b);XB(A)::QAR1(C)
      • B(c);XB(A)::QAB1(C)
      • B(c);XR(D)::QAR1(C)
      • R(b);::QAB1(C)
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