MESON Chess Problem Database

Problem Display
PID: 110630 (8/8/8/4p3/p3P3/P7/1QpkBBK1/8 w - - 0 1)

Korponai, Jozsef

2nd Comm., Express Wieczorny, 1954

8/8/8/4p3/p3P3/P7/1QpkBBK1/8

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe2
      • 2.Qxc2#
  • Tries
    • 1.Bd1?
      • threat
        • 2.Qxc2#
      • 1...Kd3
        • 2.Qxc2#
      • 1...Kxd1!
    • 1.Bd3?
      • threat
        • 2.Qxc2#
      • 1...Kd1
        • 2.Qxc2#
      • 1...Kxd3!
    • 1.Qa2?
      • 1...Kc1
        • 2.Be3#
      • 1...Kxe2
        • 2.Qxc2#
      • 1...Kc3!
    • 1.Qb3?
      • threat
        • 2.Qe3#
      • 1...Kc1
        • 2.Be3#
      • 1...Kxe2
        • 2.Qxc2#
      • 1...c1Q
        • 2.Qd3#
      • 1...c1S
        • 2.Qb2#
      • 1...c1B
        • 2.Qd3#
      • 1...c1R
        • 2.Qd3#
      • 1...axb3!
    • 1.Qb4+?
      • 1...Kc1
        • 2.Be3#
      • 1...Kxe2!
  • Keys
    • 1.Qb5!
      • 1...Kc1
        • 2.Be3#
      • 1...Kc3
        • 2.Qb4#
      • 1...c1Q
        • 2.Qd3#
      • 1...c1S
        • 2.Qb2#
      • 1...c1B
        • 2.Qd3#
      • 1...c1R
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT,XB(B)::QAR2(A),XP(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XB(B)
    • Try
      • B(B);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XB(B)
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(C)
        • K(b);P-FLIGHT,XB(B)::QAR2(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAB1(A)
      • Vars
        • K(b);S_FLIGHT::B(C)
        • K(b);P-FLIGHT,XB(B)::QAR2(A),XP(a)
        • P(a);SBLOCK::QAR1(A)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::B(C)
      • Refutation
        • K(b);P-FLIGHT,XB(B)
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • K(b);S_FLIGHT::B(C)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);SBLOCK::QAR1(A)
      • P(a);OGATEB::QAR2(A)
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