MESON Chess Problem Database

Problem Display
PID: 199906 (8/8/6B1/2pp4/7R/1n1Pk3/4p1K1/4Q3 w - - 0 1)

Croitor, Mikhail Vasilevich

Zadachi i Etyudi, 2017

8/8/6B1/2pp4/7R/1n1Pk3/4p1K1/4Q3

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qc1#
    • 1...Sc1
      • 2.Qxc1#
    • 1...Sd2
      • 2.Qf2#
      • 2.Qg1#
    • 1...Sd4
      • 2.Qc1#
    • 1...Sa5
      • 2.Qc1#
  • Tries
    • 1.Rh3+?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd4!
    • 1.Rf4?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Sa1
        • 2.Qc1#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sd2
        • 2.Qf2#
      • 1...Sd4
        • 2.Qc1#
      • 1...Sa5
        • 2.Qc1#
      • 1...d4
        • 2.Rf3#
      • 1...c4!
    • 1.Qc1+?
      • 1...Sd2
        • 2.Qg1#
      • 1...Sxc1!
    • 1.d4?
      • threat
        • 2.Qc3#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sd2
        • 2.Qf2#
        • 2.Qg1#
      • 1...cxd4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.d4#
      • 1...e1S+
        • 2.Qxe1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sd4
        • 2.Qc1#
      • 1...d4
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAB(A)
    • S(b);N_GUARD::QAB(A),XS(b)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT
    • Try
      • R(D);
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT,XR(D)::QAB1(A)
        • S(b);N_GUARD::QAB(A)
        • S(b);N_GUARD::QAB(A),XS(b)
        • S(b);SBLOCK::QAB1(A)
        • P(e);SBLOCK::R1(D)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • S(b);P_SPINS(b),SBLOCK::QAB(A)
      • Refutation
        • S(b);XQ(A)
    • Try
      • P(C);
      • Threat
        • QAR2(A)
      • Vars
        • S(b);N_GUARD::QAB(A),XS(b)
      • Refutation
        • P(d);XP(C)
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • QAR(A)+P(C)
    • Vars
      • P(a);CHECK,OGATEB::QAR2(A),XS(a)
      • P(a);OGATEB::QAR2(A),XQ(a)
      • P(a);OGATEB::QAR2(A),XB(a)
      • P(a);OGATEB::QAR2(A),XR(a)
      • S(b);N_GUARD::QAB(A),XS(b)
      • S(b);N_GUARD::QAB(A)
      • P(e);N_GUARD::R1(D)
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