MESON Chess Problem Database

Problem Display
PID: 204536 (8/Q5K1/3pp3/3pk3/4rq2/2P5/2BP3B/8 w - - 0 1)

Gotenberg, P

Revista de Sah, 1925

8/Q5K1/3pp3/3pk3/4rq2/2P5/2BP3B/8

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qd4#
      • 2.d4#
    • 1...Re2
      • 2.Qd4#
      • 2.d4#
    • 1...Re3
      • 2.Qxe3#
      • 2.Qd4#
      • 2.d4#
    • 1...Rd4
      • 2.Qxd4#
      • 2.cxd4#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qg5#
        • 2.Qf6#
      • 1...Qg3+
        • 2.Qg5#
      • 1...d4
        • 2.Qg5#
      • 1...Kf5!
    • 1.Qf7?
      • threat
        • 2.Qh5#
        • 2.Qf6#
      • 1...Qxh2
        • 2.Qf6#
      • 1...d4
        • 2.Qh5#
      • 1...Qg3+!
    • 1.d4+?
      • 1...Rxd4
        • 2.Qxd4#
        • 2.cxd4#
      • 1...Kf5!
  • Keys
    • 1.Qe3!
      • 1...Qg3+
        • 2.Qg5#
      • 1...Kf5
        • 2.Qxf4#
      • 1...Qxh2
        • 2.Qg5#
      • 1...Rxe3
        • 2.d4#
      • 1...d4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);P_PINP(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK::QAR2(E)
        • P(c);::QAR2(E)
      • Refutation
        • K(d);N_SPINP(f),N_SPINQ(b),P-FLIGHT,P_SPINR(a)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_SPINQ(b),XB(C)::QAB1(E)
        • P(c);::QAR(E)
      • Refutation
        • Q(b);CHECK
    • Try
      • P(B);CHECK
      • Refutation
        • K(d);N_SPINQ(b),P-FLIGHT,P_SPINR(a)
  • Actual
    • Q(E);P_PINR(a)
    • Vars
      • Q(b);CHECK,OGATE::QAR2(E)
      • K(d);N_SPINQ(b),P-FLIGHT::QAR1(E),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XB(C)::QAR2(E)
      • R(a);N_SPINR(a),XQ(E)::P(B)
      • P(c);N_GUARD::QAR1(E),XR(a)
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