MESON Chess Problem Database

Problem Display
PID: 229226 (3Q4/1p6/1r6/k7/1pP5/1K6/8/8 w - - 0 1)

Pikler, Robert

Magyar Sakkvilag, 1926

3Q4/1p6/1r6/k7/1pP5/1K6/8/8

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Qa8#
  • Tries
    • 1.Qg5+?
      • 1...Rb5
        • 2.Qxb5#
      • 1...Ka6!
    • 1.Qd5+?
      • 1...Rb5
        • 2.Qxb5#
      • 1...Ka6!
    • 1.Qd7?
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rd6
        • 2.Qb5#
      • 1...Re6
        • 2.Qb5#
      • 1...Rf6
        • 2.Qb5#
      • 1...Rg6
        • 2.Qb5#
      • 1...Rh6
        • 2.Qb5#
      • 1...Ra6
        • 2.Qb5#
      • 1...Rc6!
    • 1.Qe8?
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
        • 2.Qa8#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rd6
        • 2.Qb5#
      • 1...Re6
        • 2.Qb5#
      • 1...Rf6
        • 2.Qb5#
      • 1...Rg6
        • 2.Qb5#
      • 1...Rh6
        • 2.Qb5#
      • 1...Ra6
        • 2.Qb5#
      • 1...Rc6!
  • Keys
    • 1.c5!
      • threat
        • 2.Qxb6#
      • 1...Kb5
        • 2.Qxb6#
      • 1...Ka6
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINR(c),P-FLIGHT::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK,N_PINR(c)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(C),XR(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK,N_PINR(c)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(C),XR(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);N_PINR(c)
      • Threat
        • QAR1(C)
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • R(c);N_GUARD::QAR1(C),XR(c)
        • R(c);N_GUARD::QAR1(C)
      • Refutation
        • R(c);
    • Try
      • Q(C);N_PINR(c)
      • Threat
        • QAR1(C)
      • Vars
        • R(c);N_GUARD::QAR1(C),XR(c)
        • R(c);N_GUARD::QAR1(C)
      • Refutation
        • R(c);
  • Actual
    • P(B);
    • Threat
      • QAB1(C),XR(c)
    • Vars
      • K(b);N_SPINR(c),P-FLIGHT::QAR1(C),XR(c)
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