MESON Chess Problem Database

Problem Display
PID: 183406 (4Q3/2Kp3B/3PNB2/3k3p/6qR/1P1p2P1/8/8 w - - 0 1)

Fenner, A Jack

The Problemist, 1943

4Q3/2Kp3B/3PNB2/3k3p/6qR/1P1p2P1/8/8

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Be4#
      • 2.Rd4#
    • 1...Qe2
      • 2.Rd4#
    • 1...Qf3
      • 2.Rd4#
    • 1...Qh3
      • 2.Be4#
      • 2.Rd4#
    • 1...Qf5
      • 2.Rd4#
    • 1...Qxg3
      • 2.Be4#
      • 2.Rd4#
    • 1...Qa4
      • 2.Rxh5#
    • 1...Qb4
      • 2.Rxh5#
    • 1...Qc4+
      • 2.bxc4#
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qe4
      • 2.Bxe4#
    • 1...Qg5
      • 2.Be4#
      • 2.Rd4#
    • 1...Qg6
      • 2.Rd4#
    • 1...Qg7
      • 2.Be4#
      • 2.Rd4#
    • 1...Qg8
      • 2.Be4#
      • 2.Rd4#
    • 1...dxe6
      • 2.Qb5#
      • 2.Qc6#
  • Tries
    • 1.Rxg4?
      • threat
        • 2.Be4#
        • 2.Rd4#
        • 2.Rg5#
      • 1...dxe6
        • 2.Qb5#
        • 2.Qc6#
      • 1...hxg4!
  • Keys
    • 1.Bg8!
      • threat
        • 2.Qa8#
      • 1...Qc4+
        • 2.bxc4#
      • 1...Ke4
        • 2.Sd4#
      • 1...Qxe6
        • 2.Qxh5#
      • 1...Qxg8
        • 2.Rd4#
      • 1...dxe6
        • 2.Qc6#
      • 1...Qa4
        • 2.Qxh5#
      • 1...Qb4
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(b);OGATE::R1(C)
    • Q(b);N_GUARD::R(C),XP(d)
    • Q(b);CHECK,OGATE::P(A),XQ(b)
    • Q(b);OGATE::R1(C),XQ(b)
    • Q(b);N_GUARD::B(H),XQ(b)
  • Tries
    • Try
      • R(C);XQ(b)
      • Threat
        • DUALS(3)
      • Refutation
        • P(d);XR(C)
  • Actual
    • B(H);
    • Threat
      • QAB(I)
    • Vars
      • Q(b);CHECK,OGATE::P(A),XQ(b)
      • K(c);P_SPINQ(b),S_FLIGHT::QAR(I)+S(E)
      • Q(b);N_GUARD,P_SPINQ(b),XS(E)::QAR(I),XP(d)
      • Q(b);OGATE,XB(H)::R1(C)
      • P(e);OGATE,P_SPINP(e),XS(E)::QAB1(I)
      • Q(b);N_GUARD::QAR(I),XP(d)
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