MESON Chess Problem Database

Problem Display
PID: 22535 (b7/7R/2p1p3/1Nr1k1K1/1Qp1Pp2/2Np4/4R3/B5b1 w - - 0 1)

Grevlund, Per

Thema Danicum, 1981

b7/7R/2p1p3/1Nr1k1K1/1Qp1Pp2/2Np4/4R3/B5b1

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Qxc5#
  • Tries
    • 1.Sb1+?
      • 1...Bd4
        • 2.Bxd4#
        • 2.Qxc5#
      • 1...c3!
    • 1.Sd1+?
      • 1...Bd4
        • 2.Bxd4#
        • 2.Qxc5#
      • 1...c3!
    • 1.Sa2+?
      • 1...Bd4
        • 2.Bxd4#
        • 2.Qxc5#
      • 1...c3!
    • 1.Sa4+?
      • 1...Bd4
        • 2.Bxd4#
        • 2.Qxc5#
      • 1...c3!
    • 1.Sd5+?
      • 1...Bd4
        • 2.Bxd4#
      • 1...c3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qxc5#
      • 1...Kxd4+
        • 2.Sd5#
      • 1...Kd6+
        • 2.e5#
      • 1...Bxd4
        • 2.Qb8#
      • 1...Ra5
        • 2.Sf3#
      • 1...Rb5
        • 2.Sf3#
      • 1...Rd5
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAR2(D),XR(e)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • S(C);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • S(C);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • S(C);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • S(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::B(A),XB(a)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • S(F);
    • Threat
      • QAR2(D),XR(e)
    • Vars
      • K(f);CHECK,P_SPINP(c),S_FLIGHT,XS(F)::B(A)+S(C)
      • K(f);CHECK,OGATE,P_SPINR(e),S_FLIGHT::P(E)
      • B(a);SBLOCK,XS(F)::QAB(D)
      • R(e);::S(F)
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