MESON Chess Problem Database

Problem Display
PID: 235197 (4kN2/1KB1p1RN/2R5/1Qb4r/8/8/6b1/8 w - - 0 1)

Heyl, Peter

Schach, 1965

4kN2/1KB1p1RN/2R5/1Qb4r/8/8/6b1/8

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Rd6#
    • 1...Bh3
      • 2.Re6#
    • 1...Bxc6+
      • 2.Qxc6#
    • 1...Bg1
      • 2.Qxh5#
    • 1...Bf2
      • 2.Qxh5#
    • 1...Ba3
      • 2.Qxh5#
    • 1...Be3
      • 2.Qxh5#
    • 1...Bb4
      • 2.Qxh5#
    • 1...Bd4
      • 2.Qxh5#
    • 1...Bb6
      • 2.Qxh5#
    • 1...Bd6
      • 2.Qxh5#
    • 1...Ba7
      • 2.Qxh5#
  • Tries
    • 1.Ka6?
      • threat
        • 2.Qb8#
      • 1...Rd5
        • 2.Rd6#
      • 1...Bh3
        • 2.Re6#
      • 1...Bb6
        • 2.Qxh5#
      • 1...Ba7
        • 2.Qxh5#
      • 1...Bf1!
    • 1.Rxe7+?
      • 1...Bxe7
        • 2.Qxh5#
      • 1...Kxe7!
    • 1.Qa4?
      • threat
        • 2.Qa8#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...Rd5
        • 2.Rd6#
      • 1...Bh3
        • 2.Re6#
      • 1...Ba7!
  • Keys
    • 1.Ka8!
      • threat
        • 2.Qb8#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...Rd5
        • 2.Rd6#
      • 1...Bh3
        • 2.Re6#
      • 1...Bb6
        • 2.Qxh5#
      • 1...Ba7
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(c);N_PINR(B)::QAB(A)+R(B)
    • B(a);N_PINR(B)::QAB(A)+R(B)
    • B(a);CHECK,OGATE,P_SPINB(a),XR(B)::QAB(A),XB(a)
    • B(b);OGATE::QAB(A),XR(c)
  • Tries
    • Try
      • K(C);N_SPINR(B),S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • R(c);S_CUTB(a)::QAB(A)+R(B)
        • B(a);N_GUARD::QAB(A)+R(B)
        • B(b);OGATE::QAB(A),XR(c)
      • Refutation
        • B(a);P_PINQ(A)
    • Try
      • R(E);CHECK,XP(d)
      • Vars
        • B(b);OGATE,SBLOCK,XR(E)::QAB(A),XR(c)
      • Refutation
        • K(e);P-FLIGHT,XR(E)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XR(B)::QAB(A),XB(a)
        • R(c);N_PINR(B)::QAB(A)+R(B)
        • B(a);N_PINR(B)::QAB(A)+R(B)
      • Refutation
        • B(b);
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • QAR(A)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XR(B)::QAB(A),XB(a)
      • R(c);N_PINR(B)::QAB(A)+R(B)
      • B(a);N_PINR(B)::QAB(A)+R(B)
      • B(b);OGATE::QAB(A),XR(c)
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