MESON Chess Problem Database

Problem Display
PID: 175464 (B4Q2/8/1P2p3/KpR5/p2k4/r3p3/7b/4N3 w - - 0 1)

McAllister, George W

Philadelphia Times, 1899

B4Q2/8/1P2p3/KpR5/p2k4/r3p3/7b/4N3

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sc2#
      • 2.Sf3#
    • 1...Bg1
      • 2.Qd6#
    • 1...Bd6
      • 2.Qxd6#
    • 1...e5
      • 2.Qd6#
  • Tries
    • 1.Rc1?
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Sf3#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Rc3!
    • 1.Rc2?
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Sf3#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Rc3!
    • 1.Rc4+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Ke5
        • 2.Sf3#
        • 2.Re4#
      • 1...bxc4!
    • 1.Rd5+?
      • 1...Kc3
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke4
        • 2.Qb4#
        • 2.Qf3#
      • 1...exd5!
    • 1.Qf4+?
      • 1...Kxc5
        • 2.Qb4#
      • 1...Bxf4!
    • 1.Qf6+?
      • 1...Be5
        • 2.Qxe5#
      • 1...e5
        • 2.Qd6#
      • 1...Kxc5!
    • 1.Qd8+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Kxc5!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qc5#
      • 1...Kc3
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Kxe5
        • 2.Sf3#
      • 1...Bxe5
        • 2.Qb4#
      • 1...Rc3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAR2(F)
    • B(a);N_GUARD::QAR2(F),XB(a)
    • P(g);S_CUTB(a)::QAR2(F)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(e);S_FLIGHT::S(A)
        • B(a);N_GUARD::QAR2(F),XB(a)
      • Refutation
        • R(b);
    • Try
      • R(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(e);S_FLIGHT::S(A)
        • B(a);N_GUARD::QAR2(F),XB(a)
      • Refutation
        • R(b);
    • Try
      • R(C);CHECK
      • Vars
        • K(e);P-FLIGHT,XR(C)::QAR1(F)
      • Refutation
        • P(f);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(F)
        • K(e);P-FLIGHT::QAR1(F)
      • Refutation
        • P(g);XR(C)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT,XR(C)::QAB1(F)
      • Refutation
        • B(a);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(F),XB(a)
        • P(g);OGATE,P_SPINP(g)::QAR2(F)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
    • Try
      • Q(F);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(F),XB(a)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAB1(F)
    • Vars
      • K(e);S_FLIGHT::QAB1(F)
      • K(e);P-FLIGHT::QAR1(F)
      • K(e);S_FLIGHT,XR(C)::S(A)
      • B(a);SBLOCK,XR(C)::QAR2(F)
      • R(b);SBLOCK::R1(C)
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