MESON Chess Problem Database

Problem Display
PID: 52404 (3R2B1/2rb2B1/5r2/2p1kNp1/8/3n1Q1p/8/1qbR1K2 w - - 0 1)

Dobbs, Gilbert S

2nd HM.=, British Chess Magazine, 1940

3R2B1/2rb2B1/5r2/2p1kNp1/8/3n1Q1p/8/1qbR1K2

#2

7 + 10

5064 100 Years of the American Two-move Chess Problem 1962

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Qd5#
    • 1...Ba4
      • 2.Rd5#
    • 1...Bb5
      • 2.Rd5#
    • 1...Bxf5
      • 2.Rd5#
    • 1...Bc8
      • 2.Rd5#
    • 1...Be8
      • 2.Rd5#
    • 1...Se1
      • 2.Rd5#
    • 1...Sb2
      • 2.Rd5#
    • 1...Sf2
      • 2.Rd5#
  • Tries
    • 1.Re8+?
      • 1...Be6
        • 2.Rxe6#
      • 1...Bxe8!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qxf6#
      • 1...Kd4
        • 2.Bxf6#
      • 1...Kxd6
        • 2.Qxf6#
      • 1...Bf4
        • 2.Qd5#
      • 1...Bf5
        • 2.Sc4#
      • 1...Be6
        • 2.Bxf6#
      • 1...Sf4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • B(b);P_PINR(A),SBLOCK::QAR1(C)
    • B(j);OGATE::R1(F)
    • B(j);OGATE,XS(D)::R1(F)
    • S(c);OGATE::R1(A)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • B(j);N_GUARD,P_SPINB(j)::R1(F),XB(j)
      • Refutation
        • B(j);XR(F)
  • Actual
    • S(D);P_SPINQ(C)
    • Threat
      • QAB1(C),XR(h)
    • Vars
      • K(f);P_SPINS(c),S_FLIGHT::B(E),XR(h)
      • K(f);N_SPINR(h),P_SPINB(j),P_SPINS(c),S_FLIGHT,XS(D)::QAR2(C),XR(h)
      • B(b);N_PINQ(C),P_PINR(A),SBLOCK::QAR1(C)
      • B(j);N_PINQ(C)::S(D)
      • B(j);::B(E),XR(h)
      • S(c);N_PINQ(C),SBLOCK::QAB(C)
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