MESON Chess Problem Database

Problem Display
PID: 229272 (8/8/8/8/8/2p2K1N/2Q1p3/4rk2 w - - 0 1)

Ballo, Gyorgy

Magyar Sakkvilag, 1926

8/8/8/8/8/2p2K1N/2Q1p3/4rk2

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxe2#
    • 1...Rb1
      • 2.Qxe2#
    • 1...Rc1
      • 2.Qxe2#
    • 1...Rd1
      • 2.Qxe2#
  • Tries
    • 1.Ke3?
      • 1...Ra1
        • 2.Qxe2#
      • 1...Rb1
        • 2.Qxe2#
      • 1...Rc1
        • 2.Qxe2#
      • 1...Rd1
        • 2.Qxe2#
      • 1...Kg2!
    • 1.Qd3?
      • 1...Ra1
        • 2.Qxe2#
      • 1...Rb1
        • 2.Qxe2#
      • 1...Rc1
        • 2.Qxe2#
      • 1...Rd1
        • 2.Qxe2#
      • 1...c2!
    • 1.Qe4?
      • 1...Ra1
        • 2.Qxe2#
      • 1...Rb1
        • 2.Qxe2#
      • 1...Rc1
        • 2.Qxe2#
      • 1...Rd1
        • 2.Qxe2#
      • 1...c2!
    • 1.Qa2?
      • 1...Ra1
        • 2.Qxe2#
      • 1...Rb1
        • 2.Qxe2#
      • 1...Rc1
        • 2.Qxe2#
      • 1...Rd1
        • 2.Qxe2#
      • 1...c2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qg1#
        • 2.Qg2#
      • 1...Ra1
        • 2.Qg1#
      • 1...Rb1
        • 2.Qg1#
      • 1...Rc1
        • 2.Qg1#
      • 1...Rd1
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::QAB1(A),XP(c)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • R(a);N_GUARD::QAB1(A),XP(c)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • Q(A);P_PINP(c)
      • Vars
        • R(a);N_GUARD::QAB1(A),XP(c)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Vars
        • R(a);N_GUARD::QAB1(A),XP(c)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Vars
        • R(a);N_GUARD::QAB1(A),XP(c)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);::QAR1(A)
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