MESON Chess Problem Database

Problem Display
PID: 173599 (8/8/8/8/8/2Q1p3/1Rp1K3/1qk5 w - - 0 1)

Boros, Sandor

Magyar Sakkvilag, 1929

8/8/8/8/8/2Q1p3/1Rp1K3/1qk5

#2

3 + 4

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Qxc2#
    • 1...Qa1
      • 2.Qxc2#
    • 1...Qxb2
      • 2.Qe1#
  • Tries
    • 1.Kf1?
      • 1...Kd1
        • 2.Qe1#
      • 1...Qxb2
        • 2.Qe1#
      • 1...Qa2
        • 2.Qxc2#
      • 1...Qa1
        • 2.Qxc2#
      • 1...e2+!
    • 1.Rb3?
      • threat
        • 2.Qe1#
        • 2.Qxe3#
      • 1...Qb2
        • 2.Qe1#
        • 2.Qxb2#
      • 1...Qxb3!
    • 1.Qb3?
      • 1...Qa2
        • 2.Qxc2#
      • 1...Qa1
        • 2.Rxc2#
        • 2.Qxc2#
      • 1...Qxb2!
    • 1.Qc6?
      • 1...Qxb2
        • 2.Qh1#
      • 1...Qa2
        • 2.Qxc2#
      • 1...Qa1
        • 2.Qxc2#
      • 1...Kxb2!
  • Keys
    • 1.Kxe3!
      • 1...Kd1
        • 2.Qd2#
      • 1...Qxb2
        • 2.Qe1#
      • 1...Qa2
        • 2.Qxc2#
      • 1...Qa1
        • 2.Qxc2#

This anticipates 15389(1983)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD::QAR1(C),XP(c)
    • Q(a);SBLOCK,XR(A)::QAR2(C)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(C)
        • Q(a);SBLOCK,XR(A)::QAR2(C)
        • Q(a);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • P(d);CHECK
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Refutation
        • Q(a);XR(A)
    • Try
      • Q(C);N_PINP(c)
      • Vars
        • Q(a);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • Q(a);XR(A)
    • Try
      • Q(C);
      • Vars
        • Q(a);SBLOCK,XR(A)::QAR(C)
        • Q(a);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT,XR(A)
  • Actual
    • K(B);P-FLIGHT,XP(d)
    • Vars
      • K(b);N_SPINP(c),P-FLIGHT::QAR1(C)
      • Q(a);SBLOCK,XR(A)::QAR2(C)
      • Q(a);N_GUARD::QAR1(C),XP(c)
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