MESON Chess Problem Database

Problem Display
PID: 173588 (8/8/8/8/n7/PQ6/Rb1K4/1k6 w - - 0 1)

Boros, Sandor

Magyar Sakkvilag, 1926

8/8/8/8/n7/PQ6/Rb1K4/1k6

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Qxb2#
    • 1...Sc5
      • 2.Qxb2#
    • 1...Sb6
      • 2.Qxb2#
  • Tries
    • 1.Kd1?
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...Sc3+!
    • 1.Ke2?
      • 1...Kc1
        • 2.Qd1#
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...Sc3+!
    • 1.Kd3?
      • 1...Kc1
        • 2.Qc2#
      • 1...Sc3
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...Sc5+!
    • 1.Ke3?
      • 1...Sc3
        • 2.Qxb2#
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...Kc1!
    • 1.Rxb2+?
      • 1...Ka1
        • 2.Rb1#
        • 2.Ra2#
        • 2.Qa2#
      • 1...Sxb2!
    • 1.Qb4?
      • 1...Sc3
        • 2.Qxb2#
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...Kxa2!
    • 1.Qb5?
      • 1...Sc3
        • 2.Qxb2#
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...Kxa2!
  • Keys
    • 1.Ke1!
      • 1...Kc1
        • 2.Qd1#
      • 1...Sc3
        • 2.Qxb2#
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAR1(D),XB(b)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • S(c);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(D)
        • S(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • S(c);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(D)
        • S(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • S(c);CHECK
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
    • Try
      • R(A);CHECK,XB(b)
      • Refutation
        • S(c);P_SPINS(c),XR(A)
    • Try
      • Q(D);
      • Vars
        • S(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT,XR(A)
    • Try
      • Q(D);
      • Vars
        • S(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT,XR(A)
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT::QAR1(D)
      • S(c);N_GUARD::QAR1(D),XB(b)
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