MESON Chess Problem Database

Problem Display
PID: 144915 (nQ6/2n2B1R/3R2p1/2k1p1P1/p1r1P3/P7/2P2N2/K5B1 w - - 0 1)

Barry, John Finan

Daily Telegraph, 1928

(First published on Sat Feb 11 1928)

nQ6/2n2B1R/3R2p1/2k1p1P1/p1r1P3/P7/2P2N2/K5B1

#2

11 + 7

14868 Pirnie Collection 2012
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Qb4#
    • 1...Rc3
      • 2.Qb4#
    • 1...Rb4
      • 2.Qxb4#
    • 1...Rxe4
      • 2.Sxe4#
    • 1...Sb5
      • 2.Sd3#
    • 1...Sd5
      • 2.Sd3#
    • 1...Sa6
      • 2.Sd3#
    • 1...Se6
      • 2.Sd3#
    • 1...Se8
      • 2.Sd3#
    • 1...Sb6
      • 2.Qxb6#
  • Tries
    • 1.Sd1+?
      • 1...Rd4
        • 2.Qb4#
      • 1...Kxd6!
    • 1.Sh1+?
      • 1...Rd4
        • 2.Qb4#
      • 1...Kxd6!
    • 1.Sh3+?
      • 1...Rd4
        • 2.Qb4#
      • 1...Kxd6!
    • 1.Sg4+?
      • 1...Rd4
        • 2.Qb4#
      • 1...Kxd6!
    • 1.Qxc7+?
      • 1...Kb5
        • 2.Bxc4#
      • 1...Sxc7!
    • 1.Qb7?
      • threat
        • 2.Qc6#
      • 1...Sd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Kxd6!
  • Keys
    • 1.Bd5!
      • 1...Kd4
        • 2.Sd1#
      • 1...Kxd6
        • 2.Qf8#
      • 1...Rxc2
        • 2.Qb4#
      • 1...Rxe4
        • 2.Sxe4#
      • 1...Sxd5
        • 2.Sd3#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Rd4
        • 2.Rc6#
      • 1...Rc3
        • 2.Qb4#
      • 1...Rb4
        • 2.Qxb4#
      • 1...Sb5
        • 2.Sd3#
      • 1...Sa6
        • 2.Sd3#
      • 1...Se6
        • 2.Sd3#
      • 1...Se8
        • 2.Sd3#

Anticipated by 144914(1913)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,XP(C)::QAB1(K)
    • R(b);N_GUARD::QAB1(K)
    • R(b);N_GUARD::QAB1(K),XR(b)
    • R(b);XP(F)::B(B)+S(D),DCHECK,XR(b)
    • S(f);::B(B)+S(D),DCHECK
    • S(g);N_GUARD::QAB1(K),XS(g)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB1(K)
      • Refutation
        • K(c);P_SPINS(f),S_FLIGHT,XR(H)
    • Try
      • S(D);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB1(K)
      • Refutation
        • K(c);P_SPINS(f),S_FLIGHT,XR(H)
    • Try
      • S(D);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB1(K)
      • Refutation
        • K(c);P_SPINS(f),S_FLIGHT,XR(H)
    • Try
      • S(D);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB1(K)
      • Refutation
        • K(c);P_SPINS(f),S_FLIGHT,XR(H)
    • Try
      • Q(K);CHECK,XS(f)
      • Vars
        • K(c);P-FLIGHT::B(I),XR(b)
      • Refutation
        • S(g);XQ(K)
    • Try
      • Q(K);
      • Threat
        • QAR1(K)
      • Refutation
        • K(c);S_FLIGHT,XR(H)
  • Actual
    • B(I);
    • Vars
      • K(c);S_FLIGHT::B(B)+S(D)
      • K(c);OGATEB,P_SPINS(f),S_FLIGHT,XR(H)::QAB(K)
      • R(b);N_GUARD,XP(C)::QAB1(K)
      • R(b);XP(F)::B(B)+S(D),DCHECK,XR(b)
      • S(f);XB(I)::B(B)+S(D),DCHECK
      • S(g);N_GUARD::QAB1(K),XS(g)
      • R(b);SBLOCK::R1(H)
      • R(b);N_GUARD::QAB1(K)
      • R(b);N_GUARD::QAB1(K),XR(b)
      • S(f);::B(B)+S(D),DCHECK
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