MESON Chess Problem Database

Problem Display
PID: 222396 (8/3K3p/3PN3/1p1k4/2R2P2/P1pqp3/7n/6Q1 w - - 0 1)

Gold, Samuel

200 Schachaufgaben, 1883

8/3K3p/3PN3/1p1k4/2R2P2/P1pqp3/7n/6Q1

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rd4#
    • 1...Qf1
      • 2.Rd4#
    • 1...Qc2
      • 2.Rd4#
    • 1...Qe2
      • 2.Rd4#
    • 1...Qe4
      • 2.Rc5#
    • 1...Qf5
      • 2.Rd4#
    • 1...Qg6
      • 2.Rd4#
    • 1...Qd4
      • 2.Rxd4#
    • 1...e2
      • 2.Qc5#
  • Tries
    • 1.Qg2+?
      • 1...Kxc4
        • 2.Qa2#
      • 1...Qe4
        • 2.Rd4#
        • 2.Rc5#
        • 2.Qxe4#
      • 1...Sf3!
    • 1.Qg5+?
      • 1...Qf5
        • 2.Rd4#
      • 1...Kxc4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qxd3#
        • 2.Qxb5#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Qxb1
        • 2.Rd4#
      • 1...Qxc4
        • 2.Qf5#
      • 1...bxc4
        • 2.Qb7#
      • 1...Qf1
        • 2.Rd4#
        • 2.Rc5#
        • 2.Qe4#
        • 2.Qxb5#
      • 1...Qc2
        • 2.Rd4#
        • 2.Qxb5#
      • 1...Qe2
        • 2.Rd4#
        • 2.Rc5#
        • 2.Qe4#
        • 2.Qxb5#
      • 1...Qe4
        • 2.Rc5#
        • 2.Qxe4#
        • 2.Qxb5#
      • 1...Qf5
        • 2.Rd4#
        • 2.Rc5#
        • 2.Qxb5#
      • 1...Qg6
        • 2.Rd4#
        • 2.Rc5#
        • 2.Qxb5#
      • 1...Qd1
        • 2.Rc5#
        • 2.Qe4#
        • 2.Qxb5#
      • 1...Qd2
        • 2.Rc5#
        • 2.Qe4#
        • 2.Qxb5#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Sf3
        • 2.Qxb5#
      • 1...c2
        • 2.Qxb5#
      • 1...b4
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::R1(C)
    • Q(c);SBLOCK::R1(C)
    • Q(c);N_GUARD,P_PINS(F)::R1(C)
    • Q(c);N_GUARD::R1(C),XQ(c)
    • P(d);OGATE::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);OGATEB,P_PINP(E),S_FLIGHT,XR(C)::QAB(A)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);P_PINS(F),P_SPINQ(c)::R1(C)
      • Refutation
        • K(f);P_PINP(E),S_FLIGHT,XR(C)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);OGATEB,P_PINP(E),S_FLIGHT,XR(C)::QAB(A)
      • Q(c);N_GUARD,XQ(A)::R1(C)
      • Q(c);OGATE,SBLOCK,XR(C)::QAR2(A)
      • P(e);OGATE,SBLOCK,XR(C)::QAB(A)
      • Q(c);N_GUARD::R1(C),XQ(c)
      • S(a);::QAR2(A),XP(e)
      • P(b);::QAR2(A),XP(e)
      • P(e);::QAR2(A),XQ(c)
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