MESON Chess Problem Database

Problem Display
PID: 70775 (2R4b/8/3kr1N1/K3p3/3q2Q1/8/8/3R2BB w - - 0 1)

Kisis, Imants J

Sahovski Glasnik, 1969

2R4b/8/3kr1N1/K3p3/3q2Q1/8/8/3R2BB

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd1
      • 2.Qxd1#
    • 1...Qd2+
      • 2.Rxd2#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Rf6
      • 2.Rc6#
    • 1...Re7
      • 2.Rc6#
    • 1...Re8
      • 2.Rc6#
  • Tries
    • 1.Rd8+?
      • 1...Kc5
        • 2.Rc1#
      • 1...Kc7!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Qxe6#
      • 1...Qd2+
        • 2.Qb4#
      • 1...Qd5+
        • 2.Bc5#
      • 1...Ke7
        • 2.Qxe6#
      • 1...Rf6
        • 2.Qd7#
      • 1...Rg6
        • 2.Qd7#
      • 1...Rh6
        • 2.Qd7#
      • 1...Re7
        • 2.Rc6#
      • 1...Re8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_SPINQ(a),OGATE,XR(A)::QAR(D),XQ(a)
    • Q(a);CHECK,OGATEB::R(A),XQ(a)
    • Q(a);OGATEB::R(A),XQ(a)
    • Q(a);CHECK,OGATE::R1(A),XQ(a)
    • R(d);::R1(G)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT::R(A)
      • Refutation
        • K(c);N_SPINQ(a),S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • QAR1(D),XR(d)
    • Vars
      • Q(a);CHECK,OGATE::QAB(D)
      • Q(a);CHECK,OGATE::B(B)
      • K(c);N_SPINQ(a),S_FLIGHT::QAR1(D),XR(d)
      • R(d);OGATE::QAR1(D)
      • R(d);SBLOCK::R1(G)
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