MESON Chess Problem Database

Problem Display
PID: 161600 (7B/8/N4R2/3pk3/4p1P1/1NqP3K/1Q6/1n4bB w - - 0 1)

Airapetyan, Abel S

Sachovy Bulletin, 1958

7B/8/N4R2/3pk3/4p1P1/1NqP3K/1Q6/1n4bB

#2

9 + 6

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Qxh2#
    • 1...Bd4
      • 2.Qh2#
    • 1...Bc5
      • 2.Qh2#
    • 1...Bb6
      • 2.Qh2#
    • 1...Ba7
      • 2.Qh2#
  • Tries
    • 1.Sa5?
      • threat
        • 2.Sc6#
      • 1...Kd4
        • 2.Rf3#
      • 1...Bd4
        • 2.Qh2#
      • 1...d4!
    • 1.Sb4?
      • threat
        • 2.Sc6#
      • 1...Bd4
        • 2.Qh2#
      • 1...d4!
    • 1.Sac5?
      • threat
        • 2.Sd7#
      • 1...Bxc5
        • 2.Qh2#
      • 1...d4!
    • 1.Sb8?
      • threat
        • 2.Sc6#
        • 2.Sd7#
      • 1...Bd4
        • 2.Sd7#
        • 2.Qh2#
      • 1...d4!
    • 1.Qxc3+?
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qc7#
      • 1...d4
        • 2.Qa5#
        • 2.Qc5#
      • 1...Sxc3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sc6#
      • 1...Qxd3+
        • 2.Sf3#
      • 1...Kxd4
        • 2.Rf3#
      • 1...Qxd4
        • 2.Qb8#
      • 1...Bxd4
        • 2.Qh2#
      • 1...Qc6
        • 2.Sf3#
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::QAB(B),XB(b)
    • B(b);N_GUARD,N_SPINQ(c)::QAB(B)
    • B(b);N_GUARD::QAB(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(f);S_FLIGHT::B(I)+R(H)
        • B(b);N_GUARD,N_SPINQ(c),SBLOCK::QAB(B)
      • Refutation
        • P(e);N_SPINQ(c)
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • B(b);N_GUARD,N_SPINQ(c)::QAB(B)
      • Refutation
        • P(e);N_SPINQ(c)
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • B(b);N_GUARD,XS(G)::QAB(B)
      • Refutation
        • P(e);N_SPINQ(c)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);N_SPINQ(c)
    • Try
      • Q(B);CHECK,N_SPINP(D),XQ(c)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(C);N_PINQ(c)
    • Threat
      • S(C)
    • Vars
      • Q(c);CHECK,XP(D)::QAB(B)+S(C),DCHECK
      • K(f);P_SPINQ(c),S_FLIGHT,XS(C)::B(I)+R(H)
      • Q(c);N_GUARD,N_PINP(D),P_SPINQ(c),SBLOCK,XS(C)::QAB(B)
      • B(b);N_GUARD,SBLOCK,XS(C)::QAB(B)
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