MESON Chess Problem Database

Problem Display
PID: 204535 (4K3/2p5/Ppk5/2rq4/8/B1N2B2/8/5Q2 w - - 0 1)

Gotenberg, P

Revista de Sah, 1925

4K3/2p5/Ppk5/2rq4/8/B1N2B2/8/5Q2

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Bxd5#
      • 2.Qxc4#
    • 1...Rb5
      • 2.Qxb5#
  • Tries
    • 1.Bxd5+?
      • 1...Kd6
        • 2.Qf4#
        • 2.Qf6#
      • 1...Rxd5!
    • 1.Qd3?
      • threat
        • 2.Qg6#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Qxf3
        • 2.Qd7#
      • 1...Rxc3
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Qe4+!
    • 1.Qh3?
      • threat
        • 2.Qe6#
        • 2.Qd7#
        • 2.Qh6#
      • 1...Qe4+
        • 2.Qe6#
      • 1...Qxf3
        • 2.Qe6#
        • 2.Qd7#
      • 1...Rxc3
        • 2.Qd7#
      • 1...b5
        • 2.Qe6#
        • 2.Qh6#
      • 1...Kd6!
  • Keys
    • 1.Qc4!
      • 1...Qe4+
        • 2.Qe6#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Qxf3
        • 2.Qe6#
      • 1...Rxc4
        • 2.Bxd5#
      • 1...b5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::QAB1(A),XR(a)
  • Tries
    • Try
      • B(D);CHECK,XQ(b)
      • Refutation
        • R(a);XB(D)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(a)::QAR1(A),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XB(D)::QAB1(A)
      • Refutation
        • Q(b);CHECK
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);CHECK::QAR2(A)
        • R(a);XS(C)::QAB1(A)
      • Refutation
        • K(d);N_SPINQ(b),P-FLIGHT,P_SPINR(a)
  • Actual
    • Q(A);P_PINR(a)
    • Vars
      • Q(b);CHECK,OGATE::QAR2(A)
      • K(d);N_SPINQ(b),P-FLIGHT::QAR1(A),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XB(D)::QAR2(A)
      • R(a);N_SPINR(a),XQ(A)::B(D),XQ(b)
      • P(c);N_GUARD::QAR1(A),XR(a)
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