MESON Chess Problem Database

Problem Display
PID: 58064 (5r1B/p2Np2n/K3P3/R2B1kpP/ppR3p1/3r2P1/3p4/1Q3b2 w - - 0 1)

Riley, HE

Chess Life, 1958

5r1B/p2Np2n/K3P3/R2B1kpP/ppR3p1/3r2P1/3p4/1Q3b2

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Qxd3#
  • Tries
    • 1.Sxf8?
      • threat
        • 2.Bh1#
        • 2.Bg2#
        • 2.Bf3#
        • 2.Be4#
        • 2.Bc6#
        • 2.Bb7#
        • 2.Ba8#
      • 1...Sf6
        • 2.Be4#
      • 1...Bg2
        • 2.Bxg2#
        • 2.Bf3#
        • 2.Be4#
      • 1...Sxf8!
  • Keys
    • 1.Re4!
      • threat
        • 2.Re5#
      • 1...Ra3+
        • 2.Bc4#
      • 1...Rb3+
        • 2.Bc4#
      • 1...Rc3+
        • 2.Bc4#
      • 1...Re3+
        • 2.Bc4#
      • 1...Rf3+
        • 2.Bc4#
      • 1...Rxg3+
        • 2.Bc4#
      • 1...Rd4+
        • 2.Qxf1#
      • 1...Rxd5+
        • 2.Re2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(A),XR(c)
  • Tries
    • Try
      • S(I);XR(l)
      • Threat
        • DUALS(7)
      • Vars
        • S(k);::R(D)+B(E),DCHECK
      • Refutation
        • S(k);XS(I)
  • Actual
    • R(C);N_PINR(c)
    • Threat
      • R1(C)
    • Vars
      • R(c);CHECK,N_GUARD::R(D)+B(E)
      • R(c);CHECK,N_GUARD,XP(B)::R(D)+B(E)
      • R(c);CHECK,N_GUARD::QAR(A),XB(a)
      • R(c);CHECK,OGATEB,P_SPINR(c),XB(E)::QAB(A)+R(C)
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