MESON Chess Problem Database

Problem Display
PID: 195876 (8/7Q/r5q1/8/8/2B1P3/3R4/1k2K1NR w K - 0 1)

Moen, Kabe

StrateGems, 2018

8/7Q/r5q1/8/8/2B1P3/3R4/1k2K1NR

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Qxc2#
  • Tries
    • 1.Se2?
      • threat
        • 2.Kf2#
      • 1...Qxh7
        • 2.0-0#
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Rf6!
    • 1.Sf3?
      • threat
        • 2.Ke2#
        • 2.Kf2#
      • 1...Qxh7
        • 2.0-0#
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qd3
        • 2.Kf2#
      • 1...Kc1!
    • 1.Rhh2?
      • threat
        • 2.Rd1#
      • 1...Kc1
        • 2.Rd1#
      • 1...Qc2
        • 2.Qxc2#
      • 1...Rd6!
    • 1.Rb2+?
      • 1...Kc1
        • 2.Se2#
      • 1...Ka1!
    • 1.Qxg6+?
      • 1...Kc1
        • 2.Se2#
        • 2.Bb2#
        • 2.Rd1#
        • 2.Qc2#
      • 1...Rxg6!
  • Keys
    • 1.Kf2!
      • threat
        • 2.Se2#
        • 2.Sf3#
        • 2.Sh3#
      • 1...Qf5+
        • 2.Sf3#
      • 1...Rf6+
        • 2.Sf3#
      • 1...Kc1
        • 2.Se2#
      • 1...Qxh7
        • 2.Sh3#
      • 1...Qc2
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATE::QAB1(G),XQ(c)
  • Tries
    • Try
      • S(B);
      • Threat
        • R(C)+K(A)
      • Vars
        • Q(c);N_SPINQ(c),XQ(G)::0-0
        • Q(c);OGATE::QAB1(G),XQ(c)
        • Q(c);OGATE::QAB(G),XQ(c)
      • Refutation
        • R(b);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_SPINQ(c),XQ(G)::0-0
        • Q(c);OGATE::QAB1(G),XQ(c)
        • Q(c);::R(C)+K(A)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT
    • Try
      • R(C);
      • Threat
        • R(D)
      • Vars
        • K(a);N_SPINQ(c),P-FLIGHT::R1(D)
        • Q(c);OGATE::QAB1(G),XQ(c)
      • Refutation
        • R(b);
    • Try
      • R(D);CHECK
      • Vars
        • K(a);N_SPINQ(c),P-FLIGHT::S(B)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT
    • Try
      • Q(G);CHECK,XQ(c)
      • Refutation
        • R(b);XQ(G)
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • DUALS(3)
    • Vars
      • Q(c);CHECK::R(C)+S(B)
      • R(b);CHECK::R(C)+S(B)
      • K(a);N_SPINQ(c),P-FLIGHT::R(C)+S(B),DCHECK
      • Q(c);N_SPINQ(c),XQ(G)::R(C)+S(B)
      • Q(c);OGATE,P_PINR(D)::QAB1(G),XQ(c)
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