MESON Chess Problem Database

Problem Display
PID: 189503 (1b1N4/1p5p/r2P3r/3Nkp1n/p2R4/K1Qp4/5P2/8 w - - 0 1)

Yudilevich, Yuri Markovich

Pravo lidu, 1911

1b1N4/1p5p/r2P3r/3Nkp1n/p2R4/K1Qp4/5P2/8

#2

7 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Sf7#
  • Tries
    • 1.Rxd3+?
      • 1...Ke4
        • 2.Qd4#
        • 2.f3#
      • 1...Kxd6!
    • 1.Rxa4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Rb4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Rc4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Rf4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Rg4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Rh4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Qe1+?
      • 1...Kxd6
        • 2.Qe7#
      • 1...Kxd4!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sd7#
      • 1...Bxd6+
        • 2.Rb4#
      • 1...Kxf6
        • 2.Rg4#
      • 1...Rxd6
        • 2.Re4#
      • 1...Rxf6
        • 2.Qc5#
      • 1...Sxf6
        • 2.f4#
      • 1...f4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(g);SBLOCK::S(G)
  • Tries
    • Try
      • R(D);CHECK,XP(a)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • R(D);CHECK,P_SPINR(D),XP(b)
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XP(F)::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT,XR(D)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • B(j);CHECK,SBLOCK,XP(F)::QAB(C)+R(D)
      • K(c);S_FLIGHT,XS(E)::QAB(C)+R(D)
      • R(f);SBLOCK,XP(F)::QAB(C)+R(D),DCHECK
      • R(g);SBLOCK,XS(E)::QAR2(C)
      • S(e);N_GUARD,SBLOCK,XS(E)::P(A)
      • P(d);SBLOCK::QAB(C)+R(D),DCHECK
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