MESON Chess Problem Database

Problem Display
PID: 202810 (4K3/3Q1p1B/1p3P1B/b1P5/3pN3/3N1P2/4k3/2R1r1R1 w - - 0 1)

Murashev, Pavel Aleksandrovich

Pilchenko, Viacheslav Karlovich

Shanshin, Valery Yurevich

HM., Zadachi i Etyudi, 2016

4K3/3Q1p1B/1p3P1B/b1P5/3pN3/3N1P2/4k3/2R1r1R1

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Qb5#
    • 1...Kxf3
      • 2.Qg4#
  • Tries
    • 1.Sf4+?
      • 1...Kxf3
        • 2.Rg3#
        • 2.Qh3#
      • 1...Ke3!
    • 1.Sd2?
      • threat
        • 2.Rcxe1#
        • 2.Rgxe1#
        • 2.Rg2#
        • 2.Qe7#
      • 1...Rxc1
        • 2.Qe7#
      • 1...Rxg1
        • 2.Qe7#
      • 1...Rd1
        • 2.Rg2#
        • 2.Qe7#
      • 1...Rf1
        • 2.Qe7#
      • 1...Bxd2!
    • 1.Rgxe1+?
      • 1...Kxd3
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sg3#
        • 2.Sd6#
        • 2.Re3#
        • 2.Qb5#
      • 1...Kxf3
        • 2.Qh3#
      • 1...Bxe1!
    • 1.Rg2+?
      • 1...Kxd3
        • 2.Qb5#
      • 1...Kxf3
        • 2.Rf2#
        • 2.Qh3#
        • 2.Qg4#
      • 1...Kf1!
    • 1.Qxd4?
      • threat
        • 2.Qe3#
      • 1...Kxf3
        • 2.Qf2#
      • 1...Bd2!
    • 1.Qd5?
      • threat
        • 2.Sg3#
      • 1...Kxd3
        • 2.Qc4#
      • 1...Kxf3
        • 2.Qh5#
      • 1...Rxg1!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Sd2#
      • 1...Kxd3
        • 2.Sf2#
      • 1...Kxf3
        • 2.Sg5#
      • 1...Bd2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P_PINS(E),P_SPINP(c),S_FLIGHT,XS(C)::QAB(I)
    • K(b);OGATEB,P_PINS(E),S_FLIGHT,XP(D)::QAB1(I)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(E);
      • Threat
        • DUALS(4)
      • Vars
        • R(a);XR(A)::QAR(I)
        • R(a);XR(B)::QAR(I)
        • R(a);::QAR(I)
      • Refutation
        • B(d);XS(E)
    • Try
      • R(B);CHECK,XR(a)
      • Vars
        • K(b);S_FLIGHT,XP(D)::QAR2(I)
      • Refutation
        • B(d);XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P_PINS(E),P_SPINP(c),S_FLIGHT,XS(C)::QAB(I)
      • Refutation
        • K(b);P_PINS(E),P_SPINR(a),S_FLIGHT
    • Try
      • Q(I);XP(c)
      • Threat
        • QAR1(I)
      • Vars
        • K(b);P_PINS(E),S_FLIGHT,XP(D)::QAR1(I)
      • Refutation
        • B(d);
    • Try
      • Q(I);
      • Threat
        • S(E)
      • Vars
        • K(b);OGATEB,P_PINS(E),P_SPINP(c),S_FLIGHT,XS(C)::QAB1(I)
        • K(b);OGATEB,P_PINS(E),S_FLIGHT,XP(D)::QAB(I)
      • Refutation
        • R(a);XR(B)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)+S(E)
    • Vars
      • K(b);S_FLIGHT,XS(C)::B(J)+S(E),DCHECK
      • K(b);S_FLIGHT,XP(D)::S(E)
      • B(d);::QAR(I)+S(E),XB(d)
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