MESON Chess Problem Database

Problem Display
PID: 51419 (3N2N1/2pp4/Q1pk4/1p5K/3qP3/3RB3/8/8 w - - 0 1)

Baxter, FL

The Guardian, 1959

3N2N1/2pp4/Q1pk4/1p5K/3qP3/3RB3/8/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5+
      • 2.Rxd5#
  • Tries
    • 1.Rxd4+?
      • 1...Kc5
        • 2.Sb7#
        • 2.Qa7#
      • 1...Ke5!
    • 1.Qa3+?
      • 1...Ke5
        • 2.Qe7#
      • 1...c5
        • 2.Bf4#
      • 1...b4!
    • 1.Qb6?
      • threat
        • 2.Bf4#
        • 2.Qxd4#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Ke5
        • 2.Qxd4#
      • 1...Qxd3
        • 2.Bf4#
        • 2.Qc5#
      • 1...cxb6!
    • 1.Qxc6+?
      • 1...Ke5
        • 2.Sf7#
      • 1...dxc6!
    • 1.Qa7?
      • threat
        • 2.Bf4#
        • 2.Qxd4#
      • 1...Ke5
        • 2.Qxd4#
      • 1...Qxd3
        • 2.Bf4#
        • 2.Qc5#
      • 1...c5
        • 2.Bf4#
      • 1...Qd5+!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxd4#
      • 1...Qd5+
        • 2.e5#
      • 1...Kc5
        • 2.Qxd4#
      • 1...Ke5
        • 2.Qxd4#
      • 1...Qxd3
        • 2.Qf6#
      • 1...c5
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE::R1(A),XQ(a)
  • Tries
    • Try
      • R(A);CHECK,XQ(a)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
    • Try
      • Q(E);CHECK,N_PINP(c)
      • Vars
        • K(d);N_SPINQ(a),OGATE,S_FLIGHT::QAR2(E)
        • P(c);P_SPINP(c)::B(B)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATE::R1(A),XQ(a)
        • K(d);N_SPINP(c),N_SPINQ(a),S_FLIGHT::QAB1(E),XQ(a)
      • Refutation
        • P(e);N_SPINP(c),XQ(E)
    • Try
      • Q(E);CHECK,XP(c)
      • Vars
        • K(d);N_SPINQ(a),S_FLIGHT::S(F)
      • Refutation
        • P(f);XQ(E)
    • Try
      • Q(E);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);N_SPINQ(a),S_FLIGHT::QAB1(E),XQ(a)
        • P(c);::B(B)
      • Refutation
        • Q(a);CHECK
  • Actual
    • Q(E);N_PINP(c)
    • Threat
      • QAR2(E),XQ(a)
    • Vars
      • Q(a);CHECK::P(C)
      • K(d);S_FLIGHT::QAB1(E),XQ(a)
      • Q(a);N_SPINQ(a),OGATE,XR(A)::QAR2(E)
      • P(c);SBLOCK::B(B)
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Developed and maintained by Brian Stephenson.
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