MESON Chess Problem Database

Problem Display
PID: 90110 (2q2Q2/1b6/3r4/4pRp1/2Bpk3/1N4KR/r2P3B/8 w - - 0 1)

Shire, David J

Die Schwalbe, 1997

2q2Q2/1b6/3r4/4pRp1/2Bpk3/1N4KR/r2P3B/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Sc5#
    • 1...Qe6
      • 2.Sc5#
    • 1...Qd7
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qa8
      • 2.Sc5#
    • 1...Qb8
      • 2.Sc5#
    • 1...Qd8
      • 2.Sc5#
    • 1...Qe8
      • 2.Sc5#
    • 1...Bc6
      • 2.Sc5#
  • Tries
    • 1.Kg2?
      • threat
        • 2.Rxe5#
      • 1...Rxd2+
        • 2.Sxd2#
      • 1...Qxf5
        • 2.Sc5#
      • 1...Qe6
        • 2.Sc5#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qe8
        • 2.Sc5#
      • 1...Ra5
        • 2.d3#
      • 1...Rd5
        • 2.Bd3#
      • 1...Re6!
    • 1.Rh4+?
      • 1...g4
        • 2.Rxg4#
      • 1...gxh4+!
  • Keys
    • 1.Kg4!
      • threat
        • 2.d3#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Qxc4
        • 2.Rxe5#
      • 1...Rxd2
        • 2.Sxd2#
      • 1...d3
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD,XR(G)::S(C)
    • Q(h);N_GUARD::S(C)
    • Q(h);N_GUARD::S(C),XQ(h)
    • B(g);S_CUTQ(h)::S(C)
  • Tries
    • Try
      • K(D);P-FLIGHT,P_SPINP(A)
      • Threat
        • R1(G),XP(d)
      • Vars
        • R(a);CHECK,XP(A)::S(C),XR(a)
        • Q(h);N_GUARD,XR(G)::S(C)
        • Q(h);N_GUARD::S(C)
        • Q(h);N_GUARD::S(C),XQ(h)
        • R(a);N_PINP(A)::P(A)
        • R(f);SBLOCK::B(F)
      • Refutation
        • R(f);
    • Try
      • R(E);CHECK
      • Vars
        • P(e);P_SPINP(e)::R(E),XP(e)
      • Refutation
        • P(e);CHECK,XR(E)
  • Actual
    • K(D);P-FLIGHT,P_SPINR(G)
    • Threat
      • P(A)
    • Vars
      • Q(h);CHECK,OGATE,XR(G)::QAB1(H),XQ(h)
      • Q(h);N_PINR(G),XB(F)::R1(G),XP(d)
      • R(a);XP(A)::S(C),XR(a)
      • P(b);N_GUARD::R1(E)
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