MESON Chess Problem Database

Problem Display
PID: 84853 (8/3N1P2/1Rp2R2/2pkp3/8/6p1/3KN1P1/7Q w - - 0 1)

Petite, Efren

Die Schwalbe, 1960

8/3N1P2/1Rp2R2/2pkp3/8/6p1/3KN1P1/7Q

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rfxc6?
      • 1...Kc4
        • 2.Rxc5#
      • 1...c4
        • 2.Sf6#
      • 1...e4
        • 2.Rxc5#
      • 1...Ke4!
    • 1.Rd6+?
      • 1...Kc4
        • 2.Sxe5#
        • 2.Qc1#
      • 1...Ke4
        • 2.Qb1#
        • 2.Qh7#
      • 1...Kxd6!
    • 1.Qa1?
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke4
        • 2.Qxe5#
      • 1...c4
        • 2.Qxe5#
      • 1...e4!
    • 1.Qc1?
      • 1...Ke4
        • 2.Qc4#
      • 1...e4
        • 2.Qxc5#
      • 1...c4!
    • 1.Qd1?
      • 1...Kc4
        • 2.Qb3#
      • 1...c4
        • 2.Ke3#
      • 1...e4
        • 2.Kc3#
      • 1...Ke4!
    • 1.Qh5?
      • 1...Ke4
        • 2.Qf3#
        • 2.Qxe5#
      • 1...c4
        • 2.Qxe5#
      • 1...Kc4!
  • Keys
    • 1.Qg1!
      • 1...Kc4
        • 2.Qxc5#
      • 1...Ke4
        • 2.Sc3#
      • 1...c4
        • 2.Sc3#
      • 1...e4
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);XP(e)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::R1(F),XP(b)
        • P(b);::S(G)
        • P(d);SBLOCK::R1(F),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(F);CHECK
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(e),XR(F)
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAB(A)
        • K(c);S_FLIGHT::QAR1(A),XP(d)
        • P(b);SBLOCK::QAR1(A),XP(d)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAR2(A)
        • P(d);SBLOCK::QAR1(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR(A)+K(B)
        • P(d);SBLOCK::QAR(A)+K(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);P_PINP(d)
      • Vars
        • P(b);SBLOCK::QAR1(A),XP(d)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::QAR1(A),XP(b)
      • K(c);S_FLIGHT::S(C)
      • P(b);SBLOCK::S(C)
      • P(d);SBLOCK::QAR1(A),XP(b)
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