MESON Chess Problem Database

Problem Display
PID: 101139 (3B4/8/2Pkp3/3p3p/1P1R3P/3K4/4P3/2Q5 w - - 0 1)

Nagy, Odon

Good Companions, 1922

3B4/8/2Pkp3/3p3p/1P1R3P/3K4/4P3/2Q5

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qf4#
    • 1...e5
      • 2.Qh6#
  • Tries
    • 1.Kc2?
      • 1...Ke5
        • 2.Qf4#
      • 1...e5
        • 2.Qh6#
      • 1...Kxc6!
    • 1.Kc3?
      • 1...Ke5
        • 2.Qf4#
      • 1...e5
        • 2.Qh6#
      • 1...Kxc6!
    • 1.Re4?
      • threat
        • 2.Qc5#
      • 1...e5
        • 2.Qh6#
      • 1...dxe4+!
    • 1.Rg4?
      • 1...Ke5
        • 2.Qf4#
      • 1...d4
        • 2.Qc5#
      • 1...e5
        • 2.Rg6#
        • 2.Qh6#
      • 1...hxg4!
    • 1.Rxd5+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...exd5!
    • 1.Qd2?
      • 1...Ke5
        • 2.Qf4#
      • 1...e5
        • 2.Qh6#
      • 1...Kxc6!
    • 1.Qe3?
      • 1...e5
        • 2.Qh6#
      • 1...Kxc6!
    • 1.Qf4+?
      • 1...e5
        • 2.Qh6#
        • 2.Qf6#
      • 1...Kxc6!
    • 1.Qg5?
      • 1...e5
        • 2.Qf6#
        • 2.Qh6#
        • 2.Qg6#
      • 1...Kxc6!
    • 1.Qh6?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kxc6!
    • 1.Qf1?
      • 1...Ke5
        • 2.Bc7#
        • 2.Qf4#
      • 1...e5
        • 2.Qf6#
      • 1...Kxc6!
    • 1.Qc4?
      • 1...e5
        • 2.Qxd5#
      • 1...Ke5!
    • 1.e4?
      • 1...e5
        • 2.Qh6#
      • 1...Ke5!
    • 1.b5?
      • 1...Ke5
        • 2.Qf4#
      • 1...e5!
  • Keys
    • 1.Rf4!
      • 1...Ke5
        • 2.Bc7#
      • 1...d4
        • 2.Qc5#
      • 1...e5
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(a),S_FLIGHT::QAB1(A)
    • P(d);OGATEB,SBLOCK::QAR(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT::QAB1(A)
        • P(d);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XP(G)
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT::QAB1(A)
        • P(d);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XP(G)
    • Try
      • R(E);N_PINP(a)
      • Threat
        • QAB1(A)
      • Vars
        • P(d);OGATEB::QAR(A)
      • Refutation
        • P(a);CHECK,XR(E)
    • Try
      • R(E);N_PINP(a)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • P(a);::QAB1(A)
      • Refutation
        • P(b);XR(E)
    • Try
      • R(E);CHECK,XP(a)
      • Vars
        • K(c);P-FLIGHT,XR(E)::QAR1(A)
      • Refutation
        • P(d);XR(E)
    • Try
      • Q(A);
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT::QAB1(A)
        • P(d);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XP(G)
    • Try
      • Q(A);
      • Vars
        • P(d);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XP(G)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XP(G)
    • Try
      • Q(A);
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XP(G)
    • Try
      • Q(A);
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,P_SPINP(d),XP(G)
    • Try
      • Q(A);
      • Vars
        • P(d);OGATEB::QAR2(A)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XP(G)
    • Try
      • Q(A);
      • Vars
        • P(d);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT
    • Try
      • P(B);
      • Vars
        • P(d);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT
    • Try
      • P(D);
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • P(d);
  • Actual
    • R(E);N_PINP(a)
    • Vars
      • K(c);S_FLIGHT::B(H)
      • P(a);::QAB1(A)
      • P(d);OGATEB,SBLOCK::R(E)
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