MESON Chess Problem Database

Problem Display
PID: 133370 (8/8/1K2pp2/8/2B1k3/8/3P1Q2/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

200 Shakhmatni Zadachi, 1983

8/8/1K2pp2/8/2B1k3/8/3P1Q2/8

#2

4 + 3

5454 Near Snap 2015
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.d3#
    • 1...f5
      • 2.Qe3#
  • Tries
    • 1.Ka5?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Kb5?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Kc5?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Ka6?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Kc6?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Ka7?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Kb7?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Kc7?
      • 1...e5
        • 2.d3#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
  • Keys
    • 1.Qg3!
      • 1...Kd4
        • 2.Qf4#
      • 1...Kf5
        • 2.Bd3#
      • 1...e5
        • 2.Qg4#
      • 1...f5
        • 2.Qe3#

Anticipated by 145470(1906), 158943(1969), 205193(1978)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::P(A)
    • P(c);SBLOCK::QAR1(B)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(b);SBLOCK::P(A)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • K(a);S_FLIGHT::B(C)
      • P(b);SBLOCK::QAR2(B)
      • P(c);SBLOCK::QAR1(B)
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