MESON Chess Problem Database

Problem Display
PID: 235708 (3b4/Kpr5/1p1B1P2/3R3N/Q4pk1/3p4/6P1/2q4R w - - 0 1)

Pituk, Alexander

Pat a Mat, 1991

3b4/Kpr5/1p1B1P2/3R3N/Q4pk1/3p4/6P1/2q4R

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qxf4#
    • 1...Qb1
      • 2.Qxf4#
    • 1...Qd1
      • 2.Qxf4#
    • 1...Qe1
      • 2.Qxf4#
    • 1...Qg1
      • 2.Qxf4#
    • 1...Qxh1
      • 2.Qxf4#
    • 1...Qc2
      • 2.Qxf4#
    • 1...Qc3
      • 2.Qxf4#
    • 1...Qc5
      • 2.Qxf4#
    • 1...Qc6
      • 2.Qxf4#
    • 1...Rc2
      • 2.Qd7#
    • 1...Rc3
      • 2.Qd7#
    • 1...Rc4
      • 2.Qd7#
    • 1...Rc5
      • 2.Qd7#
    • 1...Rd7
      • 2.Qxd7#
    • 1...Rc8
      • 2.Qd7#
    • 1...d2
      • 2.Qxf4#
  • Tries
    • 1.Rxc1?
      • threat
        • 2.Qxf4#
      • 1...Kh4
        • 2.Qxf4#
      • 1...Rc4!
    • 1.Qd1+?
      • 1...f3
        • 2.Qxf3#
        • 2.gxf3#
      • 1...Qxd1!
  • Keys
    • 1.Bxf4!
      • threat
        • 2.Rg5#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Qxh1
        • 2.Bxc7#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Qc5
        • 2.Qd1#
      • 1...Rc5
        • 2.Qd7#
      • 1...Rg7
        • 2.Bxc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::QAR1(C),XP(c)
    • Q(a);N_GUARD,XR(A)::QAR1(C),XP(c)
    • R(g);N_GUARD::QAB(C)
    • R(g);N_GUARD,N_SPINP(c)::QAB(C)
    • R(g);N_GUARD::QAB(C),XR(g)
    • P(b);S_CUTQ(a)::QAR1(C),XP(c)
  • Tries
    • Try
      • R(A);XQ(a)
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • K(d);P-FLIGHT::QAR2(C),XP(c)
      • Refutation
        • R(g);N_SPINP(c)
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Refutation
        • Q(a);XQ(C)
  • Actual
    • B(F);XP(c)
    • Threat
      • R1(D)
    • Vars
      • Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(C),XQ(a)
      • Q(a);N_GUARD,XR(A)::QAR(C)+B(F),XR(g)
      • B(h);XP(G)::S(E),XB(h)
      • Q(a);N_GUARD::QAB(C)
      • R(g);N_GUARD::QAB(C)
      • R(g);N_GUARD::QAR(C)+B(F),XQ(a)
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