MESON Chess Problem Database

Problem Display
PID: 143394 (1Kn4b/1Npr4/8/B7/P1kP3R/P4Q2/qpr1P3/nb3B2 w - - 0 1)

Ellerman, Arnoldo

Good Companions (July), 1917

1Kn4b/1Npr4/8/B7/P1kP3R/P4Q2/qpr1P3/nb3B2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Qc6#
    • 1...Rxd4
      • 2.Qf7#
    • 1...Rd5
      • 2.Qd3#
    • 1...Rf7
      • 2.Qxf7#
  • Tries
    • 1.e4+?
      • 1...Re2
        • 2.Qc3#
      • 1...Kxd4!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Sa5#
      • 1...Rxd4
        • 2.Qf7#
      • 1...Bxd4
        • 2.e4#
      • 1...Qb3
        • 2.Qc6#
      • 1...Rd5
        • 2.Qd3#
      • 1...Sb3
        • 2.e3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(c);P_PINS(I),SBLOCK::QAR2(D)
    • R(h);N_GUARD,P_SPINR(h),XP(F)::QAB(D)
    • R(h);SBLOCK::QAB1(D)
    • R(h);N_GUARD::QAB(D),XR(h)
  • Tries
    • Try
      • P(B);CHECK
      • Vars
        • R(e);P_SPINR(e)::QAR1(D)
      • Refutation
        • K(f);P-FLIGHT,XP(F)
  • Actual
    • B(H);
    • Threat
      • S(I)
    • Vars
      • R(h);N_GUARD,P_SPINR(h),XP(F)::QAB(D)
      • B(j);P_SPINB(j),SBLOCK,XP(F)::B(A)+P(B)
      • Q(c);P_PINS(I),SBLOCK::QAR2(D)
      • R(h);SBLOCK::QAB1(D)
      • S(a);SBLOCK::B(A)+P(B)
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