MESON Chess Problem Database

Problem Display
PID: 158237 (4r2R/b3R2b/4q3/8/2N3P1/p1N2PP1/Q3P1K1/1n2k3 w - - 0 1)

Ouellet, Charles

The Problemist, 2015

4r2R/b3R2b/4q3/8/2N3P1/p1N2PP1/Q3P1K1/1n2k3

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2+
      • 2.Qxe2#
    • 1...Bg8
      • 2.Qxb1#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sxc3
      • 2.Qd2#
  • Tries
    • 1.e4?
      • threat
        • 2.Qxb1#
        • 2.Qe2#
      • 1...Qxe4
        • 2.Qxb1#
      • 1...Bxe4
        • 2.Qe2#
      • 1...Sxc3
        • 2.Qd2#
      • 1...Qd5
        • 2.Qe2#
      • 1...Qd7
        • 2.Qe2#
      • 1...Qb6
        • 2.Qe2#
      • 1...Qd6
        • 2.Qe2#
      • 1...Qh6
        • 2.Qe2#
      • 1...Rb8
        • 2.Qe2#
      • 1...Rd8
        • 2.Qe2#
      • 1...Be3
        • 2.Qe2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Qxc4!
  • Keys
    • 1.e3!
      • threat
        • 2.Qe2#
        • 2.Qf2#
      • 1...Qxc4
        • 2.Qf2#
      • 1...Qxe3
        • 2.Qf2#
      • 1...Bxe3
        • 2.Qe2#
      • 1...Sxc3
        • 2.Qd2#
      • 1...Bc2
        • 2.Rh1#
      • 1...Bd3
        • 2.Qf2#
      • 1...Sd2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(d);CHECK,OGATE,P_SPINQ(d),XP(B)::QAR1(A),XQ(d)
    • B(f);N_GUARD::QAR(A),XS(a)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • S(a);N_GUARD,XS(D)::QAB1(A)
  • Tries
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(d);P_PINP(E),P_SPINQ(d),XP(B)::QAR(A),XS(a)
        • B(f);P_PINP(E),XP(B)::QAR1(A)
        • S(a);N_GUARD,XS(D)::QAB1(A)
        • Q(d);::QAR1(A)
        • R(g);::QAR1(A)
        • B(e);::QAR1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • Q(d);XS(G)
  • Actual
    • P(B);
    • Threat
      • DUALS(2)
    • Vars
      • Q(d);XS(G)::QAB1(A)
      • Q(d);P_SPINQ(d),XP(B)::QAB1(A)
      • B(e);XP(B)::QAR1(A)
      • S(a);N_GUARD,XS(D)::QAB1(A)
      • B(f);OGATE::R(J)
      • B(f);::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
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