MESON Chess Problem Database

Problem Display
PID: 137410 (3K4/8/3k1p2/2p2P2/1NP2pN1/5P2/3p4/6Q1 w - - 0 1)

Grant, Herbert W

The Australasian Chess Review, 1929

3K4/8/3k1p2/2p2P2/1NP2pN1/5P2/3p4/6Q1

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...d1Q
      • 2.Qxd1#
    • 1...d1S
      • 2.Qxd1#
    • 1...d1B
      • 2.Qxd1#
    • 1...d1R
      • 2.Qxd1#
    • 1...cxb4
      • 2.Qb6#
  • Tries
    • 1.Sh6?
      • threat
        • 2.Sf7#
      • 1...Ke5
        • 2.Qxc5#
      • 1...cxb4!
    • 1.Qh2?
      • threat
        • 2.Qxf4#
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qxf4#
      • 1...d1S
        • 2.Qxf4#
        • 2.Qd2#
      • 1...d1B
        • 2.Qxf4#
        • 2.Qd2#
      • 1...d1R
        • 2.Qxf4#
      • 1...cxb4!
    • 1.Qe3?
      • threat
        • 2.Qxd2#
        • 2.Qxf4#
        • 2.Qd3#
        • 2.Qe6#
        • 2.Qe7#
      • 1...cxb4
        • 2.Qb6#
      • 1...d1Q
        • 2.Qxf4#
        • 2.Qe6#
        • 2.Qe7#
      • 1...d1S
        • 2.Qd2#
        • 2.Qxf4#
        • 2.Qd3#
        • 2.Qe6#
        • 2.Qe7#
      • 1...d1B
        • 2.Qd2#
        • 2.Qxf4#
        • 2.Qd3#
        • 2.Qe6#
        • 2.Qe7#
      • 1...d1R
        • 2.Qxf4#
        • 2.Qe6#
        • 2.Qe7#
      • 1...fxe3!
    • 1.Qb1?
      • threat
        • 2.Qd3#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...cxb4!
    • 1.Qf1?
      • threat
        • 2.Qd3#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...cxb4!
    • 1.Qh1?
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1S
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...cxb4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sf7#
      • 1...Kxe5
        • 2.Qxc5#
      • 1...cxb4
        • 2.Qd4#
      • 1...fxe5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • P(a);OGATEB::QAR(A),XQ(a)
    • P(a);OGATEB::QAR(A),XS(a)
    • P(a);OGATEB::QAR(A),XB(a)
    • P(a);OGATEB::QAR(A),XR(a)
    • P(c);OGATE,XS(C)::QAR2(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(d);S_FLIGHT::QAR2(A),XP(c)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(A);P_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB(A),XP(b)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(5)
      • Vars
        • P(c);OGATE,XS(C)::QAR2(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XR(a)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XR(a)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
      • Refutation
        • P(c);XS(C)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(d);S_FLIGHT,XS(E)::QAR2(A),XP(c)
      • P(c);N_GUARD,XS(C)::QAR2(A)
      • P(e);OGATEB,SBLOCK,XS(E)::QAR(A)
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