MESON Chess Problem Database

Problem Display
PID: 265929 (4NBn1/1KN1PR1r/P5P1/Rpk1r3/2P2Qn1/P1p2P2/2pP4/1q3b2 w - - 0 1)

Olariu, Mihai Nicolae

4th Comm., Buletin Problemistic TT, 1993

4NBn1/1KN1PR1r/P5P1/Rpk1r3/2P2Qn1/P1p2P2/2pP4/1q3b2

#2

14 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rxb5#
    • 1...Qa1
      • 2.Rxb5#
    • 1...Qc1
      • 2.Rxb5#
    • 1...Qd1
      • 2.Rxb5#
    • 1...Qe1
      • 2.Rxb5#
    • 1...Rd5
      • 2.Se6#
    • 1...Rf5
      • 2.Se6#
    • 1...Rg5
      • 2.Se6#
    • 1...Reh5
      • 2.Se6#
    • 1...Re6
      • 2.Sxe6#
    • 1...Bxc4
      • 2.d4#
  • Tries
    • 1.Rf5?
      • threat
        • 2.Se6#
      • 1...Bxc4
        • 2.d4#
      • 1...Rxe7!
    • 1.Qxe5+?
      • 1...Kxc4
        • 2.Qxc3#
        • 2.Qd5#
      • 1...Sxe5!
    • 1.dxc3?
      • threat
        • 2.Qd4#
      • 1...Qd1
        • 2.Rxb5#
      • 1...Rd5
        • 2.Se6#
      • 1...Re4!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Qd4#
      • 1...Qxb5+
        • 2.Rxb5#
      • 1...Rxe7+
        • 2.Qc7#
      • 1...Re4
        • 2.Qc7#
      • 1...Rd5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD::R1(F),XP(f)
    • R(h);N_GUARD::S(J)
    • R(h);N_GUARD::S(J),XR(h)
    • B(b);SBLOCK,XP(D)::P(A)
  • Tries
    • Try
      • R(L);P_PINR(h)
      • Threat
        • S(J)
      • Vars
        • B(b);SBLOCK,XP(D)::P(A)
      • Refutation
        • R(i);P_PINS(J),XP(K)
    • Try
      • Q(E);CHECK,XR(h)
      • Refutation
        • S(e);XQ(E)
    • Try
      • P(A);XP(d)
      • Threat
        • QAB1(E)
      • Vars
        • Q(a);N_GUARD::R1(F),XP(f)
        • R(h);N_GUARD::S(J)
      • Refutation
        • R(h);
  • Actual
    • S(J);P_SPINS(J),XP(f)
    • Threat
      • QAB1(E)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(J)::R1(F),XQ(a)
      • R(h);CHECK,OGATE,P_SPINR(h),XP(K)::QAR2(E)
      • R(h);OGATE::QAR2(E)
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