MESON Chess Problem Database

Problem Display
PID: 227623 (2b4b/2R5/8/3Pk2n/1Q2P1BB/3p4/8/K3R3 w - - 0 1)

ten Cate, Pieter

Dutch East Indies Chess Association, 1926

2b4b/2R5/8/3Pk2n/1Q2P1BB/3p4/8/K3R3

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4+
      • 2.e5#
    • 1...Sf6
      • 2.Bg3#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Qb8#
      • 1...Kf4+
        • 2.e5#
      • 1...Bb7!
    • 1.Re7+?
      • 1...Kf4+
        • 2.e5#
      • 1...Be6!
    • 1.Qc3+?
      • 1...Kd6
        • 2.Be7#
        • 2.Rc6#
      • 1...Kf4!
    • 1.Qd6+?
      • 1...Kd4
        • 2.Bf2#
      • 1...Kxd6+!
    • 1.Qb2+?
      • 1...Kd6
        • 2.Rc6#
      • 1...Kf4!
    • 1.Qd4+?
      • 1...Kf4
        • 2.e5#
      • 1...Kd6
        • 2.Rc6#
      • 1...Kxd4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Rc4#
      • 1...Kf4+
        • 2.Rg7#
      • 1...Kd6+
        • 2.Rc3#
      • 1...Kd4
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);CHECK,OGATE,S_FLIGHT::QAR(C)+P(D)
    • S(c);N_GUARD,SBLOCK::B(F)
  • Tries
    • Try
      • R(H);
      • Threat
        • QAB(C)
      • Vars
        • K(b);CHECK,OGATE,S_FLIGHT::R(H)+P(D)
      • Refutation
        • B(d);
    • Try
      • R(H);CHECK
      • Vars
        • K(b);CHECK,OGATE,S_FLIGHT::QAR(C)+P(D)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);P_PINQ(C),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::B(F)
      • Refutation
        • K(b);CHECK,S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P_PINQ(C),S_FLIGHT::R1(H)
      • Refutation
        • K(b);P_PINQ(C),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P_PINQ(C),S_FLIGHT::QAR(C)+P(D)
        • K(b);P_PINQ(C),S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(H)
    • Vars
      • K(b);CHECK,S_FLIGHT::QAB(C)+R(H)
      • K(b);S_FLIGHT::QAB(C)
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