MESON Chess Problem Database

Problem Display
PID: 184818 (B2Nr3/3N4/1PPp2p1/r2kp1Q1/p7/2pK4/8/2R5 w - - 0 1)

Stubbs, Arthur Goodwin

Prize, Whitgift Magazine, 1908

B2Nr3/3N4/1PPp2p1/r2kp1Q1/p7/2pK4/8/2R5

#2

8 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.c7#
    • 1...Rc5
      • 2.Sf6#
  • Tries
    • 1.Qh4?
      • threat
        • 2.Qc4#
        • 2.Qe4#
      • 1...Rxd8
        • 2.Qc4#
      • 1...Rc5
        • 2.Sf6#
        • 2.Qe4#
      • 1...e4+!
    • 1.Qg4?
      • threat
        • 2.Qc4#
        • 2.Qe4#
      • 1...Rxd8
        • 2.Qc4#
      • 1...Rc5
        • 2.Sf6#
        • 2.Qe4#
      • 1...e4+!
    • 1.Qf5?
      • threat
        • 2.Qe4#
      • 1...Rxd8
        • 2.Qf7#
      • 1...gxf5!
    • 1.Qxg6?
      • threat
        • 2.Qe4#
      • 1...Rxd8
        • 2.Qf7#
      • 1...e4+!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qa2#
      • 1...e4+
        • 2.Kxc3#
      • 1...cxd2
        • 2.Sf6#
      • 1...Rb5
        • 2.c7#
      • 1...Rc5
        • 2.Sf6#
      • 1...c2
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::B(G)+P(E)
    • R(c);SBLOCK::S(F)
  • Tries
    • Try
      • Q(C);N_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XS(H)::QAB1(C)
      • Refutation
        • P(e);CHECK
    • Try
      • Q(C);N_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XS(H)::QAB1(C)
      • Refutation
        • P(e);CHECK
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • R(h);N_GUARD,XS(H)::QAB(C)
      • Refutation
        • P(g);N_SPINP(e),XQ(C)
    • Try
      • Q(C);N_PINP(e),XP(g)
      • Threat
        • QAB1(C)
      • Vars
        • R(h);N_GUARD,XS(H)::QAB(C)
      • Refutation
        • P(e);CHECK
  • Actual
    • Q(C);N_PINP(e)
    • Threat
      • QAB(C)
    • Vars
      • P(e);CHECK,SBLOCK::QAR(C)+K(B),XP(a)
      • P(a);XQ(C)::S(F)
      • R(c);N_GUARD::B(G)+P(E)
      • R(c);SBLOCK::S(F)
      • P(a);OGATE::QAR(C),XR(c)
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