MESON Chess Problem Database

Problem Display
PID: 234968 (8/8/5K2/R7/1P4k1/Q7/8/8 w - - 0 1)

Akimov, Nikolai Nikolaevich

64 Shakhmatnoe obozrenie, 2008

8/8/5K2/R7/1P4k1/Q7/8/8

#2

4 + 1

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Ra4?
      • 1...Kf4
        • 2.b5#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
    • 1.Rc5?
      • 1...Kf4
        • 2.Rc4#
      • 1...Kh4!
    • 1.Rd5?
      • 1...Kf4
        • 2.Rd4#
      • 1...Kh4!
    • 1.Rg5+?
      • 1...Kh4
        • 2.Qg3#
      • 1...Kf4!
    • 1.Qf3+?
      • 1...Kh4
        • 2.Rh5#
      • 1...Kxf3!
    • 1.b5?
      • 1...Kf4
        • 2.Ra4#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
  • Keys
    • 1.Rh5!
      • 1...Kf4
        • 2.Rh4#
      • 1...Kxh5
        • 2.Qh3#

Anticipated by 190096(1913), 193676(1915)

This anticipates 164866(2008)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)+P(B)
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • P(B);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(C);
    • Vars
      • K(a);P-FLIGHT::R(C)
      • K(a);S_FLIGHT,XR(C)::QAR2(A)
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