MESON Chess Problem Database

Problem Display
PID: 235436 (Q5K1/1nN1B3/p4p2/2N1qR2/pP1kp1p1/1rpP2pR/B4P1b/8 w - - 0 1)

Pituk, Alexander

Freie Presse, 1991

Q5K1/1nN1B3/p4p2/2N1qR2/pP1kp1p1/1rpP2pR/B4P1b/8

#2

11 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.S7e6#
      • 2.Rd5#
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Qe6+
      • 2.S7xe6#
    • 1...Qxe7
      • 2.Rd5#
  • Tries
    • 1.Sb5+?
      • 1...Kd5
        • 2.Qxb7#
      • 1...axb5!
    • 1.S7e6+?
      • 1...Kd5
        • 2.Qxb7#
      • 1...Qxe6+!
  • Keys
    • 1.Bxf6!
      • threat
        • 2.Bxe5#
      • 1...Qxf6
        • 2.Rd5#
      • 1...Rxb4
        • 2.S7e6#
      • 1...Sxc5
        • 2.Qd5#
      • 1...gxf2
        • 2.S5e6#
      • 1...exd3
        • 2.Rf4#
      • 1...g2
        • 2.S5e6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(i);CHECK,OGATE::R1(G),XQ(i)
    • Q(i);CHECK,N_GUARD::S(H),XQ(i)
    • Q(i);OGATE,XB(I)::R1(G)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINQ(i),P_SPINR(b),P_SPINS(l)::QAB(J),XS(l)
      • Refutation
        • P(j);XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINQ(i),P_SPINR(b),P_SPINS(l)::QAB(J),XS(l)
      • Refutation
        • Q(i);CHECK,XS(H)
  • Actual
    • B(I);P_PINQ(i),XP(k)
    • Threat
      • B(I),XQ(i)
    • Vars
      • Q(i);N_SPINQ(i),OGATE,XB(I)::R1(G)
      • R(b);XP(E)::S(H)
      • S(l);OGATE,XS(F)::QAR1(J)
      • P(d);XP(B)::S(F)
      • P(g);OGATEB,XP(C)::R(G)
      • P(d);::S(F)
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