MESON Chess Problem Database

Problem Display
PID: 268930 (8/5n2/1Bp2Kn1/2rk2p1/P1Np4/3Qp1N1/8/1B4b1 w - - 0 1)

Permyakov, Evgeni Nikolaevich

Shakhmatnaya kompozitsiya, 2022

8/5n2/1Bp2Kn1/2rk2p1/P1Np4/3Qp1N1/8/1B4b1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qxd4#
    • 1...Rb5
      • 2.Qxd4#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Qxd4#
      • 1...Rxc4
        • 2.Qe4#
      • 1...e2!
    • 1.Qf5+?
      • 1...Sge5
        • 2.Qe6#
      • 1...Sfe5
        • 2.Qe6#
      • 1...Kxc4!
    • 1.Qb3?
      • threat
        • 2.Be4#
      • 1...d3
        • 2.Qxd3#
      • 1...Sd6
        • 2.Sxe3#
      • 1...Rxc4!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Qe4#
      • 1...Rxc4
        • 2.Qxd4#
      • 1...Sd6
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(d);::QAR1(B),XP(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • R(d);SBLOCK,XS(E)::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK,N_PINP(c)
      • Vars
        • S(h);P_SPINS(h)::QAB1(B)
        • S(i);P_SPINS(i)::QAB1(B)
      • Refutation
        • K(e);S_FLIGHT,XS(E)
    • Try
      • Q(B);N_PINP(c)
      • Threat
        • B(A)
      • Vars
        • P(c);OGATEB::QAR2(B),XP(c)
        • S(i);SBLOCK::QAB(B)+S(E),DCHECK,XP(b)
      • Refutation
        • R(d);P_SPINR(d),XS(E)
  • Actual
    • B(A);
    • Threat
      • QAB1(B)
    • Vars
      • R(d);P_SPINR(d),XS(E)::QAR1(B),XP(c)
      • S(i);SBLOCK::B(A)+S(E),DCHECK,XP(b)
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