MESON Chess Problem Database

Problem Display
PID: 239227 (8/8/8/6K1/3B3N/3n2kp/3R4/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 2004

8/8/8/6K1/3B3N/3n2kp/3R4/8

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Be5#
    • 1...Se1
      • 2.Be5#
    • 1...Sb2
      • 2.Be5#
    • 1...Sf2
      • 2.Be5#
    • 1...Sb4
      • 2.Be5#
    • 1...Sc5
      • 2.Be5#
    • 1...Se5
      • 2.Bxe5#
    • 1...h2
      • 2.Rxd3#
  • Tries
    • 1.Bg1?
      • threat
        • 2.Bh2#
        • 2.Rxd3#
      • 1...h2
        • 2.Rxd3#
      • 1...Sc1
        • 2.Bh2#
      • 1...Se1
        • 2.Bh2#
      • 1...Sb2
        • 2.Bh2#
      • 1...Sb4
        • 2.Bh2#
      • 1...Sf4
        • 2.Bh2#
      • 1...Sc5
        • 2.Bh2#
      • 1...Se5
        • 2.Bh2#
      • 1...Sf2!
    • 1.Be3?
      • 1...Sf2
        • 2.Bf4#
      • 1...Sc1
        • 2.Bf4#
      • 1...Se1
        • 2.Bf4#
      • 1...Sb2
        • 2.Bf4#
      • 1...Sb4
        • 2.Bf4#
      • 1...Sf4
        • 2.Bxf4#
      • 1...Sc5
        • 2.Bf4#
      • 1...Se5
        • 2.Bf4#
      • 1...h2!
    • 1.Be5+?
      • 1...Sf4
        • 2.Bxf4#
      • 1...Sxe5!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Sf5#
      • 1...Sxf2
        • 2.Be5#
      • 1...h2
        • 2.Rf3#

Anticipated by 2479(1859), 23030(1996)

This anticipates 199903(2017)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::B(B)
    • S(a);N_GUARD::B(B),XS(a)
    • P(c);SBLOCK::R(A),XS(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::R(A),XS(a)
        • S(a);::B(B)
      • Refutation
        • S(a);
    • Try
      • B(B);
      • Vars
        • S(a);N_GUARD::B(B)
        • S(a);N_GUARD::B(B),XS(a)
      • Refutation
        • P(c);
    • Try
      • B(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(B),XS(a)
      • Refutation
        • S(a);XB(B)
  • Actual
    • R(A);
    • Threat
      • S(C)
    • Vars
      • S(a);N_GUARD,SBLOCK,XR(A)::B(B)
      • P(c);SBLOCK::R1(A)
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