MESON Chess Problem Database

Problem Display
PID: 746 (1R6/2p5/k1N5/r3p3/8/1N5K/p4B2/Q3b3 w - - 0 1)

Gooderson, Arthur R

British Chess Magazine, 1948

1R6/2p5/k1N5/r3p3/8/1N5K/p4B2/Q3b3

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sc5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Bb4
      • 2.Sxb4#
  • Tries
    • 1.Sbxa5?
      • 1...Bxf2
        • 2.Qf1#
      • 1...Bxa5
        • 2.Qf1#
      • 1...Bd2
        • 2.Qf1#
      • 1...Bc3
        • 2.Qf1#
      • 1...Bb4
        • 2.Qf1#
      • 1...e4!
    • 1.Qd4?
      • threat
        • 2.Qa7#
      • 1...Bxf2
        • 2.Sb4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...exd4!
    • 1.Qxe1?
      • threat
        • 2.Sb4#
        • 2.Qxa5#
      • 1...a1Q
        • 2.Sb4#
      • 1...a1R
        • 2.Sb4#
      • 1...Ra3
        • 2.Sb4#
        • 2.Qf1#
        • 2.Qe2#
      • 1...Ra4
        • 2.Sc5#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Rd5
        • 2.Sb4#
      • 1...Rb5!
  • Keys
    • 1.Qxa2!
      • threat
        • 2.Sc5#
      • 1...Bxf2
        • 2.Qxa5#
      • 1...Ra3
        • 2.Qe2#
      • 1...Bb4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::S(C)
    • R(c);N_GUARD,P_SPINP(b)::S(C),XR(c)
    • B(a);N_GUARD::S(E),XB(a)
  • Tries
    • Try
      • S(C);XR(c)
      • Vars
        • B(a);OGATE,XB(B)::QAB(A)
        • B(a);OGATE,XS(C)::QAB(A)
        • B(a);OGATE::QAB(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);N_GUARD,XB(B)::S(E)
        • R(c);N_GUARD::S(C),XR(c)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::S(E)
        • R(c);N_GUARD::S(C)
        • R(c);N_GUARD::S(C),XR(c)
        • R(c);::S(E)
      • Refutation
        • R(c);
  • Actual
    • Q(A);P_PINR(c),XP(b)
    • Threat
      • S(C)
    • Vars
      • B(a);N_GUARD,XB(B)::QAR1(A),XR(c)
      • R(c);N_GUARD,P_PINS(C)::QAB(A)
      • B(a);N_GUARD::S(E),XB(a)
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