MESON Chess Problem Database

Problem Display
PID: 78017 (8/8/8/2B5/1p2N3/1Rr1P2K/R1P1k1P1/Q7 w - - 0 1)

Davey, David Murray

The Tablet, 1956

(First published on Sat Jan 21 1956)

8/8/8/2B5/1p2N3/1Rr1P2K/R1P1k1P1/Q7

#2

9 + 3

15239 Valois Notebooks 2017
3713 Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Rxc2#
    • 1...Rd3
      • 2.cxd3#
    • 1...Rxe3+
      • 2.Rxe3#
    • 1...Rxc5
      • 2.c4#
  • Tries
    • 1.Sxc3+?
      • 1...Kd2
        • 2.Qd1#
      • 1...Kf2
        • 2.e4#
      • 1...bxc3!
    • 1.Sg3+?
      • 1...Kf2
        • 2.Qf1#
      • 1...Kd2!
    • 1.Rxc3?
      • 1...b3
        • 2.cxb3#
      • 1...bxc3!
  • Keys
    • 1.Qb1!
      • 1...Rxe3+
        • 2.Rxe3#
      • 1...Rxc2
        • 2.Rxc2#
      • 1...Rxb3
        • 2.cxb3#
      • 1...Rxc5
        • 2.c4#
      • 1...Rc4
        • 2.c3#
      • 1...Rd3
        • 2.cxd3#

Anticipated by 193550(1915)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);N_PINP(F),OGATE,P_SPINR(b),XP(C)::R(B),XR(b)
    • R(b);OGATE::R(B)+P(C),XR(b)
    • R(b);CHECK,OGATE,XP(F)::R1(E),XR(b)
    • R(b);N_PINP(F),OGATE,XB(I)::R(B)+P(C)
  • Tries
    • Try
      • S(H);CHECK,N_SPINP(F),XR(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::B(I)+P(F)
      • Refutation
        • P(c);XS(H)
    • Try
      • S(H);CHECK,N_SPINP(F)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(E);N_SPINP(F),XR(b)
      • Vars
        • P(c);OGATE::R(B)+P(C),XP(c)
      • Refutation
        • P(c);XR(E)
  • Actual
    • Q(A);
    • Vars
      • R(b);CHECK,OGATE,XP(F)::R1(E),XR(b)
      • R(b);N_PINP(F),OGATE,P_SPINR(b),XP(C)::R(B),XR(b)
      • R(b);OGATE,XR(E)::R(B)+P(C),XR(b)
      • R(b);N_PINP(F),OGATE,XB(I)::R(B)+P(C)
      • R(b);N_PINP(F),OGATE::R(B)+P(C)
      • R(b);OGATE::R(B)+P(C),XR(b)
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