MESON Chess Problem Database

Problem Display
PID: 59528 (4R1B1/r1p1Pb1P/3p4/p1Pk1p1N/Q3RP2/1P3NP1/3K3b/8 w - - 0 1)

Storozhenko, Ivan Ivanovich

5th Prize, Zadachi i Etyudi, 2002

4R1B1/r1p1Pb1P/3p4/p1Pk1p1N/Q3RP2/1P3NP1/3K3b/8

#2

13 + 8

56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Rd8#
    • 1...c6
      • 2.Qc4#
      • 2.Qd4#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Qc6#
      • 1...Kxe4
        • 2.Sf6#
      • 1...Kxc5
        • 2.Qb5#
      • 1...fxe4
        • 2.Qc4#
      • 1...c6
        • 2.Qxc6#
      • 1...Ra6!
    • 1.Rc4?
      • threat
        • 2.Bxf7#
      • 1...Bxg8
        • 2.hxg8Q#
        • 2.hxg8B#
      • 1...dxc5
        • 2.Qd7#
      • 1...Be6
        • 2.Sf6#
      • 1...Ke6!
    • 1.Rd4+?
      • 1...Ke6
        • 2.Sg5#
      • 1...Kxc5!
    • 1.Qb5?
      • threat
        • 2.Sf6#
      • 1...Kxe4
        • 2.Qd3#
      • 1...fxe4
        • 2.Bxf7#
      • 1...dxc5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qc4#
      • 1...Kxc5
        • 2.Qc6#
      • 1...Ke6
        • 2.Bxf7#
      • 1...dxc5
        • 2.Qc6#
      • 1...dxe5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATEB,SBLOCK,XP(H)::R(L)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(E)
      • Vars
        • K(c);N_SPINB(h),S_FLIGHT,XR(F)::S(I)
        • K(c);N_SPINB(h),OGATEB,P-FLIGHT,XP(H)::QAR1(E)
        • P(d);SBLOCK,XR(F)::QAB1(E)
        • P(g);::QAB1(E),XP(g)
      • Refutation
        • R(f);
    • Try
      • R(F);
      • Threat
        • B(M),XB(h)
      • Vars
        • B(h);N_SPINB(h),OGATE,XB(M)::PXB(h)=Q
        • P(e);OGATEB,XP(H)::QAR2(E)
        • B(h);::S(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(c);S_FLIGHT::S(C)
      • Refutation
        • K(c);N_SPINB(h),P-FLIGHT,XP(H)
    • Try
      • Q(E);
      • Threat
        • S(I)
      • Vars
        • K(c);N_SPINB(h),S_FLIGHT,XR(F)::QAB1(E)
        • P(d);SBLOCK,XR(F)::B(M),XB(h)
      • Refutation
        • P(e);P_SPINP(e),XP(H)
  • Actual
    • S(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(c);N_SPINB(h),P-FLIGHT,XP(H)::QAR1(E)
      • K(c);S_FLIGHT::B(M),XB(h)
      • P(e);XP(H)::QAB1(E)
      • P(e);OGATE,XS(C)::R1(F),XP(e)
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