MESON Chess Problem Database

Problem Display
PID: 269336 (8/8/2p1R3/4N3/3kp3/1Q6/8/6K1 w - - 0 1)

Petrasinovic, Petrasin

Magyar Sakkvilag, 2021

8/8/2p1R3/4N3/3kp3/1Q6/8/6K1

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qc4#
    • 1...c5
      • 2.Sc6#
  • Tries
    • 1.Kf1?
      • 1...e3
        • 2.Qc4#
      • 1...c5
        • 2.Sc6#
      • 1...Kc5!
    • 1.Kh1?
      • 1...e3
        • 2.Qc4#
      • 1...c5
        • 2.Sc6#
      • 1...Kc5!
    • 1.Kg2?
      • 1...e3
        • 2.Qc4#
      • 1...c5
        • 2.Sc6#
      • 1...Kc5!
    • 1.Kh2?
      • 1...e3
        • 2.Qc4#
      • 1...c5
        • 2.Sc6#
      • 1...Kc5!
    • 1.Re7?
      • 1...e3
        • 2.Qc4#
      • 1...c5
        • 2.Sc6#
      • 1...Kc5!
    • 1.Re8?
      • 1...e3
        • 2.Qc4#
      • 1...c5
        • 2.Sc6#
      • 1...Kc5!
    • 1.Qc3+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxc3!
    • 1.Qb4+?
      • 1...Kd5
        • 2.Qd6#
        • 2.Qc4#
      • 1...Ke3!
  • Keys
    • 1.Qc2!
      • 1...Ke3
        • 2.Qf2#
      • 1...Kd5
        • 2.Qc4#
      • 1...e3
        • 2.Qc4#
      • 1...c5
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR1(B)
    • P(c);SBLOCK::S(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(c);SBLOCK::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(c);SBLOCK::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(c);SBLOCK::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(c);SBLOCK::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(c);SBLOCK::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(c);SBLOCK::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(B)
      • K(a);N_GUARD,P-FLIGHT::QAB1(B)
      • P(b);SBLOCK::QAR1(B)
      • P(c);SBLOCK::QAR2(B)
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