MESON Chess Problem Database

Problem Display
PID: 74710 (2R2K2/4Rn2/3k4/8/2P5/2nr4/6b1/7Q w - - 0 1)

Rice, John Michael

The Problemist, 1972

2R2K2/4Rn2/3k4/8/2P5/2nr4/6b1/7Q

#2

5 + 5

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rc6#
      • 2.Qc6#
      • 2.c5#
    • 1...Bh3
      • 2.Rc6#
      • 2.Qc6#
      • 2.c5#
    • 1...Bd5
      • 2.c5#
    • 1...Bc6
      • 2.Rxc6#
      • 2.Qxc6#
    • 1...Bb7
      • 2.c5#
    • 1...Ba8
      • 2.c5#
    • 1...Sd5
      • 2.c5#
    • 1...Sh6
      • 2.Qxh6#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qb4#
        • 2.Qb8#
      • 1...Bc6
        • 2.Qb4#
      • 1...Rd5
        • 2.Qg6#
        • 2.Qb6#
        • 2.Qb8#
      • 1...Bb7
        • 2.Qb4#
      • 1...Sa2
        • 2.Qb8#
      • 1...Sa4
        • 2.Qb8#
      • 1...Se4
        • 2.Qxd3#
        • 2.Qb6#
        • 2.Qb8#
      • 1...Sb5
        • 2.Qb4#
      • 1...Sd5
        • 2.c5#
      • 1...Sxb1!
    • 1.Qh2+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Rg3!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa3#
      • 1...Rd5
        • 2.Qa6#
      • 1...Sb1
        • 2.Qf6#
      • 1...Sd1
        • 2.Qf6#
      • 1...Sa2
        • 2.Qf6#
      • 1...Se2
        • 2.Qf6#
      • 1...Sa4
        • 2.Qf6#
      • 1...Se4
        • 2.Qa6#
      • 1...Sb5
        • 2.Qf6#
      • 1...Sd5
        • 2.c5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • B(a);::P(B)
    • S(b);SBLOCK::P(B)
    • S(e);N_GUARD::QAR(A),XS(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB(A)
        • S(b);::QAB(A)
        • S(b);SBLOCK::P(B)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(c);S_CUTB(a)::QAR(A)
      • S(b);OGATE::QAR2(A)
      • S(b);S_CUTB(a)::QAR(A)
      • S(b);SBLOCK::P(B)
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