MESON Chess Problem Database

Problem Display
PID: 172503 (8/8/8/2ppp2K/4k3/5R2/8/Q7 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2001

8/8/8/2ppp2K/4k3/5R2/8/Q7

#2

3 + 4

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qa8#
  • Tries
    • 1.Kg4?
      • 1...d4
        • 2.Qa8#
      • 1...c4!
    • 1.Re3+?
      • 1...Kf4
        • 2.Qxe5#
      • 1...Kf5
        • 2.Qxe5#
      • 1...Kxe3!
    • 1.Qc3?
      • threat
        • 2.Qd3#
        • 2.Qe3#
      • 1...c4
        • 2.Qe3#
      • 1...d4!
    • 1.Qb1+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxf3!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qd3#
        • 2.Qe3#
      • 1...Kd4
        • 2.Qd3#
      • 1...c4
        • 2.Qe3#
      • 1...d4
        • 2.Qa8#

Anticipated by 172438(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAB(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A),XP(d)
        • K(a);S_FLIGHT::QAR1(A),XP(d)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • P(b);::QAR1(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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