MESON Chess Problem Database

Problem Display
PID: 133487 (8/8/8/8/K4B1Q/8/1Rp1p3/3k4 w - - 0 1)

Garai, Toma

To Mat, 1958

8/8/8/8/K4B1Q/8/1Rp1p3/3k4

#2

4 + 3

5454 Near Snap 2009
133 The Problemist Supplement 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c1S
      • 2.Rd2#
    • 1...c1R
      • 2.Rd2#
    • 1...e1B
      • 2.Qg4#
      • 2.Qh5#
  • Tries
    • 1.Bd2?
      • threat
        • 2.Qe1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...Kxd2!
    • 1.Qh2?
      • 1...Ke1
        • 2.Qg1#
      • 1...c1Q
        • 2.Qxe2#
      • 1...c1B
        • 2.Qxe2#
      • 1...c1R
        • 2.Qxe2#
      • 1...e1Q
        • 2.Qxc2#
      • 1...e1S
        • 2.Qd2#
      • 1...e1B
        • 2.Qxc2#
        • 2.Qh5#
      • 1...e1R
        • 2.Qxc2#
        • 2.Qd2#
      • 1...c1S!
    • 1.Qg4?
      • 1...Ke1
        • 2.Qg1#
      • 1...c1Q
        • 2.Qxe2#
      • 1...c1B
        • 2.Qxe2#
      • 1...c1R
        • 2.Qxe2#
      • 1...c1S!
  • Keys
    • 1.Qf2!
      • 1...c1Q
        • 2.Qxe2#
      • 1...c1S
        • 2.Rd2#
      • 1...c1B
        • 2.Qxe2#
      • 1...c1R
        • 2.Rd2#
        • 2.Qxe2#
      • 1...e1Q
        • 2.Qxc2#
      • 1...e1S
        • 2.Qd2#
      • 1...e1B
        • 2.Qxc2#
        • 2.Qf3#
      • 1...e1R
        • 2.Qxc2#
        • 2.Qd2#

This anticipates 235503(1981), 67367(2006)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE,SBLOCK::R1(A)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(D)
      • Vars
        • P(c);::QAR1(D),XQ(c)
        • P(c);::QAR1(D),XS(c)
        • P(c);::QAR1(D),XB(c)
        • P(c);::QAR1(D),XR(c)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XB(C)
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
        • P(b);::QAB1(D),XP(c)
        • P(c);OGATE,SBLOCK::QAB1(D),XP(b)
        • P(c);OGATE::QAR1(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);P_PINP(c)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR2(D)
        • P(b);::QAB1(D),XP(c)
      • Refutation
        • P(b);
  • Actual
    • Q(D);
    • Vars
      • P(b);::QAB1(D),XP(c)
      • P(b);OGATE,SBLOCK::R1(A)
      • P(c);OGATE,SBLOCK::QAB1(D),XP(b)
      • P(c);OGATE::QAR1(D)
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