MESON Chess Problem Database

Problem Display
PID: 235478 (4K3/2p5/1p3R2/4k1p1/8/6n1/2R1nQB1/8 w - - 0 1)

Derevchuk, Oleksandr Andrinovich

Zadachi i Etyudi, 2001

4K3/2p5/1p3R2/4k1p1/8/6n1/2R1nQB1/8

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sh1
      • 2.Rxe2#
    • 1...Sh5
      • 2.Rxe2#
    • 1...b5
      • 2.Rc5#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Re6#
      • 1...Sf5+
        • 2.Rxf5#
      • 1...Se4
        • 2.Rf5#
      • 1...Sd4
        • 2.Qxg3#
      • 1...Sf4!
    • 1.Rd2?
      • threat
        • 2.Rd5#
      • 1...Sf4
        • 2.Qd4#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se4
        • 2.Qf5#
      • 1...c6!
    • 1.Rf5+?
      • 1...Kd6
        • 2.Rc6#
      • 1...Ke6
        • 2.Rc6#
      • 1...Sxf5!
  • Keys
    • 1.Rcc6!
      • threat
        • 2.Rce6#
        • 2.Rfe6#
      • 1...Se4
        • 2.Rf5#
      • 1...Sf4
        • 2.Qb2#
      • 1...Sd4
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::R(A),XS(a)
    • P(e);N_GUARD::R(A)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Threat
        • R1(D)
      • Vars
        • S(b);CHECK,N_GUARD::R1(D),XS(b)
        • S(b);N_GUARD::R1(D)
        • S(a);N_GUARD,SBLOCK::QAB(B),XS(b)
      • Refutation
        • S(a);
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • S(a);N_GUARD::QAB1(B)
        • S(b);N_GUARD::QAR1(B),XS(b)
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • P(f);
    • Try
      • R(D);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(A)
        • K(c);P-FLIGHT::R(A)
      • Refutation
        • S(b);XR(D)
  • Actual
    • R(A);
    • Threat
      • DUALS(2)
    • Vars
      • S(b);N_GUARD::R1(D)
      • S(a);OGATE::QAB(B)
      • S(a);N_GUARD,SBLOCK::QAB(B),XS(b)
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