MESON Chess Problem Database

Problem Display
PID: 245450 (4RQ2/1Kp5/6N1/2NpR3/3kp2p/1P6/1P4nb/4B3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Gaudium, 2012

4RQ2/1Kp5/6N1/2NpR3/3kp2p/1P6/1P4nb/4B3

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qf2#
    • 1...Se3
      • 2.Bc3#
    • 1...e3
      • 2.Bc3#
  • Tries
    • 1.Sxh4?
      • threat
        • 2.Sf5#
      • 1...Ke3
        • 2.Qf2#
      • 1...Se3
        • 2.Bc3#
      • 1...Sxh4!
    • 1.Rxd5+?
      • 1...Ke3
        • 2.Rxe4#
        • 2.Qf2#
      • 1...Kxd5!
    • 1.Rd8?
      • threat
        • 2.Rxe4#
      • 1...Ke3
        • 2.Qf2#
      • 1...e3
        • 2.Bc3#
        • 2.Re4#
        • 2.Rexd5#
        • 2.Rdxd5#
      • 1...Bxe5!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sf5#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kxc5
        • 2.Rxd5#
      • 1...Kxe5
        • 2.Sc6#
      • 1...Se3
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);P_SPINP(d),S_FLIGHT::QAB1(I)
    • S(a);SBLOCK::B(A)
    • P(d);::B(A)
  • Tries
    • Try
      • S(F);XP(e)
      • Threat
        • S(F)
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT::QAB1(I)
        • S(a);SBLOCK::B(A)
      • Refutation
        • S(a);XS(F)
    • Try
      • R(E);CHECK,XP(f)
      • Refutation
        • K(c);P-FLIGHT,XR(E)
    • Try
      • R(H);P_PINP(f)
      • Threat
        • R1(E),XP(d)
      • Vars
        • K(c);N_SPINP(f),P_SPINP(d),S_FLIGHT::QAB1(I)
      • Refutation
        • B(b);XR(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(c);P_SPINP(d),S_FLIGHT::QAB1(I)
      • K(c);P_SPINP(f),S_FLIGHT,XS(D)::R1(E),XP(f)
      • K(c);S_FLIGHT,XR(E)::R(H)+S(F),DCHECK
      • S(a);SBLOCK::S(F)
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