MESON Chess Problem Database

Problem Display
PID: 157394 (8/8/4Kp2/8/3pkr2/3pPrp1/5n2/2Q5 w - - 0 1)

Vladimirov, Yakov Georgevich

Lud, 1966

8/8/4Kp2/8/3pkr2/3pPrp1/5n2/2Q5

#2

3 + 8

15148 Sadier Collection 2016
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Qc6#
    • 1...dxe3
      • 2.Qc4#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qxd4#
      • 1...Rxe3
        • 2.Qb7#
      • 1...dxe3
        • 2.Qb4#
      • 1...Kxe3!
    • 1.Qc3?
      • threat
        • 2.Qxd4#
      • 1...Kxe3
        • 2.Qe1#
      • 1...Rxe3
        • 2.Qc6#
      • 1...dxe3
        • 2.Qb4#
        • 2.Qc4#
      • 1...dxc3!
    • 1.Qc4?
      • threat
        • 2.Qxd4#
      • 1...Rxe3
        • 2.Qd5#
        • 2.Qc6#
      • 1...Kxe3!
    • 1.Qc5?
      • threat
        • 2.Qxd4#
      • 1...Rxe3
        • 2.Qd5#
        • 2.Qc6#
      • 1...dxe3
        • 2.Qb4#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Kxe3!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxd4#
      • 1...Kxe3
        • 2.Qe1#
      • 1...Rxe3
        • 2.Qa8#
      • 1...dxe3
        • 2.Qa4#

This anticipates 173571(1984)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XP(B)::QAB(A)
    • P(e);OGATEB,SBLOCK,XP(B)::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • R(c);SBLOCK,XP(B)::QAB(A)
        • P(e);OGATEB,SBLOCK,XP(B)::QAR(A)
      • Refutation
        • K(f);P-FLIGHT,XP(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • K(f);OGATEB,P-FLIGHT,P_SPINP(b),XP(B)::QAR2(A)
        • R(c);SBLOCK,XP(B)::QAB(A)
      • Refutation
        • P(e);XQ(A)
    • Try
      • Q(A);P_PINP(e)
      • Threat
        • QAR1(A),XP(e)
      • Refutation
        • K(f);N_SPINP(e),P-FLIGHT,XP(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(e)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(e),XP(B)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(e)
    • Vars
      • K(f);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
      • R(c);SBLOCK,XP(B)::QAB(A)
      • P(e);OGATEB,SBLOCK,XP(B)::QAR(A)
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