MESON Chess Problem Database

Problem Display
PID: 46407 (8/8/8/8/8/5Kn1/2Q1p3/2Rqk3 w - - 0 1)

Neyndorff, Luke

StrateGems, 2003

8/8/8/8/8/5Kn1/2Q1p3/2Rqk3

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc1
      • 2.Qxc1#
    • 1...Sf1
      • 2.Qxe2#
    • 1...Sh1
      • 2.Qxe2#
    • 1...Se4
      • 2.Qxe2#
    • 1...Sf5
      • 2.Qxe2#
    • 1...Sh5
      • 2.Qxe2#
  • Tries
    • 1.Kxg3?
      • 1...Qxc1
        • 2.Qxc1#
      • 1...Kf1!
    • 1.Qd3?
      • 1...Kf1
        • 2.Rxd1#
      • 1...Sf1
        • 2.Qxe2#
      • 1...Sh1
        • 2.Qxe2#
      • 1...Se4
        • 2.Qxe2#
      • 1...Sf5
        • 2.Qxe2#
      • 1...Sh5
        • 2.Qxe2#
      • 1...Qxc1!
    • 1.Qb2?
      • 1...Qxc1
        • 2.Qxc1#
      • 1...Sf1
        • 2.Qxe2#
      • 1...Sh1
        • 2.Qxe2#
      • 1...Se4
        • 2.Qxe2#
      • 1...Sf5
        • 2.Qxe2#
      • 1...Sh5
        • 2.Qxe2#
      • 1...Kf1!
  • Keys
    • 1.Qc4!
      • 1...Kf1
        • 2.Rxd1#
      • 1...Kd2
        • 2.Qc3#
      • 1...Qxc1
        • 2.Qxc1#
      • 1...Sf1
        • 2.Qxe2#
      • 1...Sh1
        • 2.Qxe2#
      • 1...Se4
        • 2.Qxe2#
      • 1...Sf5
        • 2.Qxe2#
      • 1...Sh5
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_SPINQ(a),OGATE,XR(A)::QAR2(B),XQ(a)
    • S(d);N_GUARD::QAR1(B),XP(c)
  • Tries
    • Try
      • K(C);P-FLIGHT,XS(d)
      • Vars
        • Q(a);N_SPINQ(a),OGATE,XR(A)::QAR2(B),XQ(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::R(A),XQ(a)
        • S(d);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • Q(a);N_SPINQ(a),XR(A)
    • Try
      • Q(B);
      • Vars
        • Q(a);N_SPINQ(a),OGATE,XR(A)::QAR2(B),XQ(a)
        • S(d);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c)::R(A),XQ(a)
      • K(b);N_SPINQ(a),S_FLIGHT::QAB1(B)
      • Q(a);N_SPINQ(a),OGATE,XR(A)::QAR2(B),XQ(a)
      • S(d);N_GUARD::QAR1(B),XP(c)
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