MESON Chess Problem Database

Problem Display
PID: 96678 (4N1B1/3pR3/3pb3/N3knR1/3p4/3KprP1/4P3/3Q4 w - - 0 1)

Rosberger, Jack

US Problem Bulletin, 1993

4N1B1/3pR3/3pb3/N3knR1/3p4/3KprP1/4P3/3Q4

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Sc4#
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bf7#
        • 2.Bg8#
      • 1...Rxg3
        • 2.Rxf5#
      • 1...d5
        • 2.Bxf5#
        • 2.Bxd7#
        • 2.Bf7#
        • 2.Bg8#
      • 1...dxe6!
    • 1.Qa4?
      • threat
        • 2.Qxd4#
      • 1...Kd5
        • 2.Qb5#
        • 2.Qxd4#
      • 1...Rf4!
    • 1.Qa1?
      • threat
        • 2.Qxd4#
      • 1...Kd5
        • 2.Qxd4#
      • 1...Rf4!
    • 1.exf3?
      • 1...Kd5
        • 2.Rxf5#
      • 1...d5
        • 2.f4#
      • 1...e2!
  • Keys
    • 1.Qh1!
      • 1...Kd5
        • 2.Rxf5#
      • 1...Rxg3
        • 2.Qe4#
      • 1...Rf1
        • 2.Sc4#
        • 2.Qe4#
      • 1...Rf2
        • 2.Sc4#
        • 2.Qe4#
      • 1...Rf4
        • 2.Sc4#
      • 1...d5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(I);XB(g)
      • Threat
        • DUALS(6)
      • Vars
        • R(b);N_GUARD,XP(D)::R1(F),XS(e)
      • Refutation
        • P(h);P_SPINP(h),XB(I)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(c)
      • Refutation
        • R(b);
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(A),XP(c)
      • Refutation
        • R(b);
    • Try
      • P(B);XR(b)
      • Vars
        • K(d);P-FLIGHT::R(F),XS(e)
        • P(f);SBLOCK::P(B)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(d);P-FLIGHT,P_SPINR(b)::R(F),XS(e)
      • R(b);OGATE,XP(D)::QAR1(A)
      • R(b);::S(E)
      • P(f);SBLOCK::QAB(A)
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