MESON Chess Problem Database

Problem Display
PID: 52407 (8/5p2/1p6/pR6/Qbk1b2R/1N6/4NP1K/5B2 w - - 0 1)

Gamage, Frederick

Washington Star, 1941

(First published on Wed Sep 24 1941)

8/5p2/1p6/pR6/Qbk1b2R/1N6/4NP1K/5B2

#2

8 + 6

5064 100 Years of the American Two-move Chess Problem 1962
145 StrateGems 1998
5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Tries
    • 1.Sed4+?
      • 1...Kc3
        • 2.Qa1#
      • 1...Bd3!
    • 1.Sf4+?
      • 1...Bd3
        • 2.Sd5#
      • 1...Kc3!
    • 1.Sbd4?
      • threat
        • 2.Qb3#
      • 1...Kd3
        • 2.Qc2#
      • 1...Bc2!
    • 1.Rh3?
      • threat
        • 2.Sd2#
        • 2.Rc3#
      • 1...Bd3
        • 2.Sd2#
      • 1...Bf3!
    • 1.Rc5+?
      • 1...Kd3
        • 2.Sec1#
        • 2.Sg1#
        • 2.Sg3#
        • 2.Sed4#
        • 2.Sf4#
        • 2.Qb5#
      • 1...bxc5!
    • 1.Qxb4+?
      • 1...Kd3
        • 2.Sed4#
        • 2.Qc3#
        • 2.Qxe4#
      • 1...axb4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sec1#
      • 1...Bd6+
        • 2.Sg3#
      • 1...Kxb3
        • 2.Sd4#
      • 1...Kd3
        • 2.Sed4#
      • 1...Kxb5
        • 2.Sed4#
      • 1...Bc5
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAB(F)
      • Refutation
        • B(c);N_SPINB(a),P_SPINB(c)
    • Try
      • S(B);CHECK
      • Vars
        • B(c);N_SPINB(a),P_SPINB(c)::R(G)+S(B)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
    • Try
      • S(E);
      • Threat
        • QAB1(F)
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::QAB1(F)
      • Refutation
        • B(c);
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::S(E)
      • Refutation
        • B(c);
    • Try
      • R(H);CHECK
      • Refutation
        • P(e);XR(H)
    • Try
      • Q(F);CHECK,P_PINB(c),XB(a)
      • Refutation
        • P(d);XQ(F)
  • Actual
    • Q(F);N_PINB(a),P_PINB(c)
    • Threat
      • B(A)+S(B)
    • Vars
      • B(a);CHECK::B(A)+S(B)
      • K(b);N_SPINB(c),P_SPINB(a),S_FLIGHT,XS(E)::S(B)
      • K(b);N_SPINB(c),S_FLIGHT::B(A)+S(B)
      • K(b);N_SPINB(c),S_FLIGHT,XR(H)::B(A)+S(B),DCHECK
      • B(a);::B(A)+S(B)
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