MESON Chess Problem Database

Problem Display
PID: 87410 (8/8/8/2p2p2/2K2p2/4kp1p/4pR1P/RQ6 w - - 0 1)

Vovan, Nguyen

Matou, 1993

8/8/8/2p2p2/2K2p2/4kp1p/4pR1P/RQ6

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd2
      • 2.Qd3#
      • 2.Qc1#
    • 1...Kxf2
      • 2.Qg1#
    • 1...e1Q
      • 2.Qxe1#
    • 1...e1S
      • 2.Qxe1#
    • 1...e1B
      • 2.Qxe1#
    • 1...e1R
      • 2.Qxe1#
  • Tries
    • 1.Kc3?
      • 1...e1Q+
        • 2.Qxe1#
      • 1...e1B+
        • 2.Qxe1#
      • 1...Kxf2
        • 2.Qg1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...c4!
    • 1.Ra2?
      • 1...e1Q
        • 2.Qd3#
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qd3#
        • 2.Qxe1#
      • 1...e1R
        • 2.Qd3#
        • 2.Qxe1#
      • 1...Kxf2!
    • 1.Ra3+?
      • 1...Kd2
        • 2.Rd3#
      • 1...Kxf2!
    • 1.Rxe2+?
      • 1...Kxe2
        • 2.Qe1#
      • 1...fxe2!
    • 1.Rxf3+?
      • 1...Kd2
        • 2.Ra2#
        • 2.Rd3#
        • 2.Qa2#
        • 2.Qd3#
        • 2.Qc1#
        • 2.Qb2#
      • 1...Kxf3!
    • 1.Qc2?
      • 1...e1Q
        • 2.Rxe1#
      • 1...e1S
        • 2.Rxe1#
      • 1...e1B
        • 2.Rxe1#
      • 1...e1R
        • 2.Rxe1#
        • 2.Ra3#
      • 1...Kxf2!
    • 1.Qc1+?
      • 1...Kxf2
        • 2.Qg1#
      • 1...Ke4!
    • 1.Qg1?
      • 1...Kd2
        • 2.Qc1#
      • 1...e1Q
        • 2.Rxe1#
        • 2.Qxe1#
      • 1...e1S
        • 2.Rxe1#
        • 2.Qxe1#
      • 1...e1B
        • 2.Rxe1#
        • 2.Qxe1#
      • 1...e1R
        • 2.Rxe1#
        • 2.Qxe1#
      • 1...Ke4!
  • Keys
    • 1.Qh1!
      • 1...Kd2
        • 2.Qc1#
      • 1...Kxf2
        • 2.Qg1#
      • 1...Ke4
        • 2.Rxe2#
      • 1...e1Q
        • 2.Qxf3#
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxf3#
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxf3#
        • 2.Qxe1#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
    • P(a);OGATEB::QAR2(B),XQ(a)
    • P(a);OGATEB::QAR2(B),XS(a)
    • P(a);OGATEB::QAR2(B),XB(a)
    • P(a);OGATEB::QAR2(B),XR(a)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(a);CHECK,OGATEB::QAR2(B),XQ(a)
        • P(a);CHECK,OGATEB::QAR2(B),XB(a)
        • K(b);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
        • P(a);OGATEB::QAR2(B),XS(a)
        • P(a);OGATEB::QAR2(B),XR(a)
      • Refutation
        • P(f);
    • Try
      • R(A);
      • Vars
        • P(a);OGATEB::QAR2(B),XS(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(C)
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::R1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • R(C);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT,XR(C)::QAR1(B)
      • Refutation
        • P(c);XR(C)
    • Try
      • R(C);CHECK,XP(c)
      • Refutation
        • K(b);P-FLIGHT,XR(C)
    • Try
      • Q(B);
      • Vars
        • P(a);OGATEB::R(A),XQ(a)
        • P(a);OGATEB::R(A),XS(a)
        • P(a);OGATEB::R(A),XB(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAB1(B)
      • K(b);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • K(b);P-FLIGHT,P_SPINP(c)::R(C),XP(a)
      • P(a);OGATEB::QAR2(B),XS(a)
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