MESON Chess Problem Database

Problem Display
PID: 158732 (1RR5/2q2r2/3p3B/3P1N2/B2p4/P1kp1p2/1r1Nn2K/Q1b3n1 w - - 0 1)

Edward, Y

Mishev, M

Phenix, 1988

1RR5/2q2r2/3p3B/3P1N2/B2p4/P1kp1p2/1r1Nn2K/Q1b3n1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Sb1#
      • 2.Se4#
      • 2.Rxc4#
    • 1...Qc6
      • 2.Rxc6#
    • 1...Rxf5
      • 2.Rxc7#
    • 1...Rf6
      • 2.Rxc7#
    • 1...Rf8
      • 2.Rxc7#
  • Tries
    • 1.Qxc1+?
      • 1...Rc2
        • 2.Rb3#
      • 1...Sxc1!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Sb1#
        • 2.Se4#
      • 1...Bxd2
        • 2.Qxb2#
      • 1...Rf4
        • 2.Sb1#
      • 1...Sf4
        • 2.Se4#
      • 1...Re7
        • 2.Sb1#
      • 1...Sg3
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(j);OGATE::R(J),XQ(j)
    • R(k);N_GUARD,XS(G)::R(J),XQ(j)
    • R(k);N_GUARD::R(J),XQ(j)
  • Tries
    • Try
      • Q(A);CHECK,N_PINR(c),XB(a)
      • Vars
        • R(c);P_SPINR(c)::R1(I)
      • Refutation
        • S(d);P_PINS(B),XQ(A)
  • Actual
    • S(G);P_SPINS(G),XP(i)
    • Threat
      • DUALS(2)
    • Vars
      • B(a);N_GUARD,XS(B)::QAB1(A),XR(c)
      • R(k);N_PINS(G)::S(B)
      • S(d);N_PINS(G),P_PINS(B)::S(G)
      • R(k);::S(B)
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