MESON Chess Problem Database

Problem Display
PID: 139662 (8/3p4/1p1N4/1R2P1p1/2p2kP1/2Pr1p1P/2QP1K2/8 w - - 0 1)

Jordan, Gijsbertus

The Problemist, 1937

8/3p4/1p1N4/1R2P1p1/2p2kP1/2Pr1p1P/2QP1K2/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2+
      • 2.Qxd2#
    • 1...Rxc3
      • 2.Qe4#
      • 2.Qf5#
    • 1...Re3
      • 2.Qf5#
      • 2.dxe3#
    • 1...Rd4
      • 2.Qf5#
    • 1...Rd5
      • 2.Qe4#
      • 2.Qf5#
    • 1...Rxd6
      • 2.Qf5#
  • Tries
    • 1.Rd5?
      • 1...Rxd2+
        • 2.Qxd2#
      • 1...Rxc3
        • 2.Qe4#
        • 2.Qf5#
      • 1...Rxd5
        • 2.Qe4#
        • 2.Qf5#
      • 1...Re3
        • 2.Qf5#
        • 2.dxe3#
      • 1...Rd4
        • 2.Qf5#
      • 1...b5!
    • 1.Qb1?
      • 1...Rxc3
        • 2.Qe4#
        • 2.Qf5#
      • 1...Rxd6
        • 2.Qf5#
      • 1...Rd5
        • 2.Qe4#
        • 2.Qf5#
      • 1...Re3
        • 2.Qf5#
        • 2.dxe3#
      • 1...Rd4
        • 2.Qf5#
      • 1...Rxd2+!
    • 1.e6?
      • threat
        • 2.Rf5#
      • 1...Rxd2+
        • 2.Qxd2#
      • 1...Rd5
        • 2.Qe4#
      • 1...dxe6!
  • Keys
    • 1.Qc1!
      • 1...Rxd2+
        • 2.Qxd2#
      • 1...Rxc3
        • 2.dxc3#
      • 1...Rxd6
        • 2.d3#
      • 1...Rd5
        • 2.d4#
      • 1...Re3
        • 2.dxe3#
      • 1...Rd4
        • 2.d3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,OGATE,XP(B)::QAB(A),XR(a)
    • R(a);OGATE::QAR1(A)
    • R(a);OGATE,XS(I)::QAR1(A)
  • Tries
    • Try
      • R(G);
      • Vars
        • R(a);CHECK,OGATE,XP(B)::QAB(A),XR(a)
        • R(a);OGATE::QAR1(A)
      • Refutation
        • P(f);
    • Try
      • Q(A);
      • Vars
        • R(a);OGATE,XS(I)::QAR1(A)
        • R(a);OGATE::QAR1(A)
      • Refutation
        • R(a);CHECK,XP(B)
    • Try
      • P(H);
      • Threat
        • R1(G)
      • Vars
        • R(a);CHECK,OGATE,XP(B)::QAB(A),XR(a)
        • R(a);OGATE::QAR1(A)
      • Refutation
        • P(g);XP(H)
  • Actual
    • Q(A);
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
      • R(a);OGATE,XP(D)::QAB(A)+P(B),XR(a)
      • R(a);OGATE,XS(I)::QAB(A)+P(B)
      • R(a);OGATE::QAB(A)+P(B)
      • R(a);OGATE::P(B),XR(a)
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