MESON Chess Problem Database

Problem Display
PID: 236974 (8/3p4/8/2Q3K1/4k3/4N3/6R1/8 w - - 0 1)

Antipin, Ivan Ivanovich

Sem Shakhmatnikh not, 2017

8/3p4/8/2Q3K1/4k3/4N3/6R1/8

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sd1?
      • 1...Kd3
        • 2.Qd5#
      • 1...Kf3
        • 2.Qd5#
      • 1...d5
        • 2.Qe3#
      • 1...d6!
    • 1.Sf5?
      • 1...Kd3
        • 2.Qd4#
        • 2.Qc2#
      • 1...Kf3
        • 2.Qd5#
      • 1...d5
        • 2.Qe3#
      • 1...d6!
    • 1.Re2?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qc4#
      • 1...d5
        • 2.Qxd5#
      • 1...Kf3!
    • 1.Rg3?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kd3!
    • 1.Qd4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Kxd4!
    • 1.Qd6?
      • 1...Kf3
        • 2.Qf4#
      • 1...Kxe3!
    • 1.Qc4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kxe3!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf3
        • 2.Qd5#
      • 1...d5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • K(a);S_FLIGHT::QAB(C)
        • P(b);SBLOCK::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAB(C)
        • P(b);SBLOCK::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Threat
        • QAB1(C)
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::QAB(C)
      • P(b);SBLOCK::QAR1(C)
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