MESON Chess Problem Database

Problem Display
PID: 157316 (K7/2p5/pk6/R7/8/P7/8/4Q3 w - - 0 1)

Andreev, Aleksandr Grigorevich

200 Shakhmatni Zadachi, 1983

K7/2p5/pk6/R7/8/P7/8/4Q3

#2

4 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qe6#
  • Tries
    • 1.Kb8?
      • 1...Kc6
        • 2.Qe6#
      • 1...c6
        • 2.Qb4#
      • 1...c5!
    • 1.Rc5?
      • threat
        • 2.Qb4#
        • 2.Qa5#
      • 1...a5
        • 2.Qxa5#
      • 1...c6
        • 2.Qa5#
      • 1...Kxc5!
    • 1.Qc3?
      • threat
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...c6!
    • 1.Qb1+?
      • 1...Kxa5
        • 2.Qb4#
      • 1...Kc6!
    • 1.Qe3+?
      • 1...Kc6
        • 2.Qe6#
      • 1...c5
        • 2.Qxc5#
      • 1...Kxa5!
    • 1.Qe5?
      • threat
        • 2.Qc5#
      • 1...Kc6
        • 2.Qe6#
      • 1...c5
        • 2.Qxc5#
      • 1...c6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qc5#
      • 1...Kxa5
        • 2.Qb4#
      • 1...Kc6
        • 2.Qe6#
      • 1...c6
        • 2.Qd8#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • P(c);
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB1(A),XP(a)
        • P(c);::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(C)::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • P(c);P_SPINP(c)::QAB1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);S_FLIGHT,XR(C)::QAB1(A)
      • K(b);P-FLIGHT::QAR2(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
      • P(c);::QAB1(A),XP(c)
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